PTV Vissim FAQs

Detailed FAQ

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Basic FAQ

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The setup stops with an error message “MS Visual C++ Runtime Error R6030: CRT not installed." or similar. (#113)

This suggests that another setup or Windows update is running at the same time. Please run the Vissim setup again after the other setup/update has finished.

Relevant version: Vissim 6.00

When trying to run Vissim after installing for the first time, nothing happens. What went wrong? (#105)

Symantec Endpoint Protection (SEP) is installed. This problem is fixed in Symantec Endpoint Protection 11 Maintenance Release (MR) 3.

Does Vissim run on 64-bit operating systems?  (#86)

Yes. There ist a 32-bit and a 64-bit edition available for Vissim that both work with a 64-bit operating system. The 64-bit edition runs only on 64-bit operating systems but enables the use of more than 3 GB of RAM.

Unless you work with networks that need access to additional RAM, we recommend to install the 32-bit edition of Vissim as there are a few limitations with the 64-bit edition:

  • Background vector image formats: SVG (Scalable Vector Graphics) is not supported, there is only limited support for DXF/DWG files.
  • Some external signal control interfaces are not available as 64-bit edition. However, the following interfaces do work both with the 32-bit and the 64-bit edition of VISSIM: RBC, SCATS, SCOOT, VAP, VISSIG.
  • Some external emission models and external driver models are not available as 64-bit edition.
  • The DDE interface for deprecated signal control interfaces (external EXE files) is not supported.
  • Database export only works with Windows 64-bit if a 64-bit OLE driver is installed. Example: Microsoft Office 64-bit is required for an export to Microsoft Access (mdb). With 64-bit we recommend using the MS SQL Server Express Edition instead.
  • For static 3D models only V3D files are supported (SKP, DWF and 3DS are not available).

Which graphics card has the best performance with Vissim 3D? (#6)

We recommend graphics cards of the AMD Radeon series (for Desktop computers e.g. Radeon R7 260). AMD FirePro cards are more expensive for the same performance (a FirePro W5100 is slower than a Radeon R7 260).
Nvidia GeForce graphics series with Fermi or Kepler architecture (400 and later, e.g. GeForce GTX 750) are okay when using the Vissim command line parameter "-notwosidedlighting". This dramatically increases 3D performance but unfortunately reduces image quality of some 3D models.
Nvidia Quadro cards with Fermi or Kepler architecture have good 3D performance even without "-notwosidedlighting". However, they are more expensive for the same performance with Vissim (a Quadro K4000 is slower than a GeForce GTX 750).

For Notebooks it's important to have a dedicated graphics chip, not only onboard graphics. Even the latest Intel HD4000 graphics is really slow for 3D visualization.

It is also important to use the latest graphics driver that is available either from the notebook or graphics card manufacturer's website.

Please check also FAQ #108.

I've installed Vissim on a server and placed the network dongle in one of the USB slots. When I try to run Vissim from any client, I get the error message "Application could not be initialized." What could be the problem?  (#5)

Please check the following points:

  • Is the necessary version of the Microsoft® .NET framework installed on all clients? (see Vissim installations manual for .NET Framework version information)
  • Do the clients have write access to the Vissim/exe directory on the server?
  • In the "local intranet" settings of each client, is "Full trust" activated? To find this setting, go to "Control Panel" - "Administrative Tools" and select the Microsoft® .NET Framework Wizards. Choose "Adjust .net security" - "Change settings for this computer" - "Next" - "local intranet" and move the slider to "full trust". Confirm with "Next" - "Finish".

When trying to run Vissim, I get this message: "This Vissim version has expired." What do I have to do? (#4)

This message indicates that the expiry date of your Vissim version is reached (e.g. in a lease, demo or test version). If you feel that you get this message in error, please contact our customer service via e-mail at

What are the hardware and software requirements for Vissim?  (#3)

In addition to the typical specifications of a common PC, these are the main requirements for the current Vissim version:

Operating system:

Either one of the following Microsoft® operating systems is required to run Vissim:

  • Windows® 10, Windows® 8: from Vissim 5.40-07.
    For previous versions manual installation of dongle drivers and  Microsoft® .NET Framework 3.5 is required.
  • Windows® 7
  • Windows® Vista (ServicePack 2) - from Vissim 10 is no longer supported
  • (Windows® XP: is officially no longer supported)

For 32-bit operating systems Microsoft® .NET Framework 4.5 is required. (A language independent installation setup is included in the Vissim setup).

On 64-bit operating systems both Vissim editions can be operated. In order to operate the 64-bit edition of Vissim, a 64-bit operating system is essential.


  • Processor: min. Pentium IV; recommended: Core i7
  • Speed: min. 2 GHz (faster computer speed results in faster simulation speed)
  • Memory (RAM): min. 2 GB (4 GB for the 64-bit edition); recommended: 4-8 GB. For large networks containing many cars and/or pedestrians more RAM may be necessary.
  • Hard disk space: depending on the installation settings up to 1.5 GB
  • Hardware lock (dongle) protection: one fully functional USB port
  • Screen resolution: min. 1280x800 or 1366x768 Pixel; recommended: Full HD (1920x1080 Pixel)
  • Graphics card: for 3D Graphics OpenGL®-support is essential. For details please check FAQ #6.

Who provides support for the software?  (#2)

E-mail support is available by means of a hotline form on the PTV website. In several areas around the globe also our distributors provide hotline support. Please check FAQ #72 for detailed hotline information.

Is there a demo version available?  (#1)

Yes, please check our English or German demo version website for download.

Models and algorithms

Are there any default values supplied with Vissim? (#10)

Comprehensive default values are supplied for vehicle types and classes as well as for driving and lane change behavior. The parameters of motorized traffic originate from research work done by the University of Karlsruhe.

How many different types of vehicles/drivers can be modeled?  (#9)

Vissim uses vehicle-driver-units. There are practically no limits on the number of vehicle and driver types. By default, the vehicle types Car, HGV, Bus, Tram, Pedestrian and Bike are included. Along with all their default specifications VISSIM provides a quick project start.

What are the algorithms that the model uses for vehicle following and lane change? (#7)

The model uses the psycho-physical car-following model developed by Wiedemann. It uses vehicle-driver-units that incorporate several stochastical variations. Thus there are virtually no two vehicles that have exactly the same driving behavior.
For lane change a related rule-based model is used that was originally designed by Sparmann.
Continuous development of both models ensures up-to-date driving behaviour in VISSIM.

General program handling

I try to open the Vissim online help but I get only an empty window. Sometimes also an error message appears. How can I make it work again? (#104)

Most likely one of the following reasons causes the problem:

  1. the online help is not stored on a local drive
  2. the # character is used in the path of the Vissim installation

In both cases the online help will not function properly.

Problem (1) is caused by a Microsoft® security patch that blocks executing help files on remote drives. To overcome this problem the easiest way is to install Vissim locally or on a virtual machine. If this is not possible or not desired, system administrator find another solution in the Microsoft® knowledge base.

To overcome problem (2), Vissim needs to be installed in a path without using any # characters.


When I open an INP file I get a message that a SIG file cannot be found. What can I do? (#103)

Since Vissim 5.20 fixed time signal controls are not stored in the INP file directly any more but in a separate SIG file for each signal controller (apart from the file extension this is similar to all other types of signal controllers). Hence all SIG files referenced by an INP file need to be resident in the same directory as the INP file in order for the INP file to load correctly.

Relevant version: from 5.20

Some VISSIM dialog windows have a non suitable size or position. How can I reset to defaults? (#93)

All the window size and placement settings are stored in the registry. To restore VISSIM to the default settings, call VDIAG.EXE (contained in the same directory as VISSIM.EXE), go to the "Actions" tab and press "Reset windows position".

I try to run an example and there is a list of files with extensions .KFG and .SZP not found. What can I do? (#19)

At first, these files are not essential for the simulation to run. In order to correct the error, you need to open Signal Control - Edit Controllers.... For each signal control where a SZP file is missing, go to the tab "SigTimTblConfig", delete the entry next to "Configuration file" and confirm with OK. Similarly, for each missing KFG file, delete the configuration file entry on the tab "LDP Config".

Do I have to take into account any warm-up period prior to the actual simulation? (#18)

A simulation always starts with an empty network. Thus warm-up periods need to be included in order to get realistic results. This is done by enhancing the simulation period by the warm-up period and set the start of the simulation (time of day) earlier by the same amount of time. Make sure that all evaluations start after the warm-up period (by changing their start time). 
Furthermore you may use the snapshot functionality which allows to start a simulation not only from the beginning but from a simulation state saved earlier. For details, please check the PTV Vissim 5.4 help > "Simulation and Test" > "Saving the Simulation State".

Relevant version: Vissim 5.40

Is there a way to create an animation and show it without the hardware lock? (#16)

Yes. The Vissim Viewer can be used without a hardware lock. For more information please refer to the PTV Vissim 6 help > "Welcome!" > "The PTV Vissim Viewer". To update the Viewer to a new service pack, please check FAQ #94.

Network modeling

I've modelled a single track two-way road section with a conflict area, but traffic from one side does not seem to stop for opposing traffic. What is wrong? (#112)

For the vehicle that does not stop most likely the end of the conflict area is not visible. This may happen e.g. if a relevant connector starts inside a conflict area. Relevant means that the route sequence of a vehicle includes traveling on that connector.

To resolve the problem try moving either the connector outside of the conflict area or shorten/split the link so that it does not overlap with the relevant connector.

Some conflict areas appear to operate with different priority than that as coded. Yielding vehicles appear to take priority. How can I avoid this?  (#102)

In order for a vehicle to react in a conflict area it has to see the end of the conflict area. For long conflict areas it may happen that the defined number of "observed vehicles" is too low to accomodate for all vehicles (the conflict area internally is counted as vehicle as well).

To solve the problem, the minimum look ahead distance must be increased to ensure that vehicles see the end of the conflict area - independently of the number of "observed vehicles". We recommend to apply this driving behavior only to those links/connectors where it is required in order to keep the simulation speed as fast as possible.

I have a situation where HGVs disappear from the network after 60 seconds of waiting time for lane change to turn left. Other vehicles would let them in, but they don't change lanes. Why? (#46)

Check if the lane where the HGV wants to change to, is closed to HGVs (button "Lane Closure..." in the link/connector window) or if the lane change to this lane is banned for HGV (button "No lane change..." in the link/connector window).

What kind of possibilities are there in Vissim to model signal controller? (#45)

Fixed time signal control is included in the standard license. The add-on VISSIG provides additional functionality in the signal program editor beyond the VISSIM standard version. Models of several standard controllers for traffic actuated control are available as separate, independent products. Also available is VisVAP, a graphical flow chart tool to develop and edit an own vehicle actuated signal control logic including any type of special features (e.g. PT priority, railroad preemption, variable message signs on motorways etc.).

How do I model right turn on red? (#44)

 Please refer to the PTV Vissim 6 help > "Creating and editing a network" > "Modeling right-of-way without SC" > "Modeling stop signs and toll counters" > "Using stop signs for right turning vehicles even if red".

Can Vissim model yellow boxes and keep-clear-areas? Is it possible to add the yellow box to the drawing? (#41)

Yellow boxes can be modeled using conflict areas or priority rules. For details on priority rules please refer to the PTV Vissim 6 help > "Creating and editing a network" > "Modeling right-of-way without SC" > "Modeling priority rules" > "Examples of priority rules" > "Priority rule Example 2: Avoiding tailbacks at a junction".

Visualization of the yellow box can be done if you include it in a background graphics file. You can also load multiple background files simultaneously.

Is it possible to model overtaking into oncoming traffic lanes, e.g. for a rural single-lane carriageway? (#40)

Not directly. As Vissim uses directional links, it is only possible at fixed locations and using priority rules, e.g. for a bus stopping at a bus stop. An example is included with the standard Vissim installation at "..\Example\Training\SpecialModeling\OvertakeBus_OncomingTraffic".

Relevant version: up to Vissim 5.40

How are banned movements specified? (#39)

When using static routes, a movement is banned if there is no route assigned to that movement (if routes do exist for at least one other movement). Routes are dependent on vehicle classes thus allowing banned turns for a certain class only.
When using Dynamic Assignment, connectors may be closed to certain vehicle classes.

How does Vissim handle grade-separated junctions? (#37)

Even if you draw links crossing each other, the program will not recognize this as an intersection unless you model connectors or any type of junction control (signal control, conflict areas and/or priority rules).

For 3D mode you may enter a height value to any link/connector to show the different levels.

Can platooning effects be modelled? (#34)

Yes, it is possible. Platooning effects can be generated by

  • modelling the adjacent junctions (platoons formed by signals)
  • lengthening incoming links (platoons formed by car-following and different desired speeds).

How are bus lines and stops modelled? Are bus detection, signals and priority measures modelled?  (#33)

Public transport is modelled as trams and/or buses in high detail with fixed routes. Stops and timetables are modelled as well. Waiting times at stops depend on the timetable and on a user defined random distribution for the passenger interchange times. Optionally the dwell time calculation method can be chosen which uses real passenger flows to determine waiting times. Priority on signal control junctions can be modelled completely with detection and control logic using a vehicle actuated signal controller.

Is it possible to model features such as blocking back, shock waves, local knowledge by some drivers (using rat runs), lane drop and gain, variable message sign (VMS) etc. in Vissim? (#32)

Since the model is microscopic, shock waves and blocking back are modelled inherently.
Local knowledge can be modelled in Dynamic Assignment by defining different vehicle classes and allowing rat runs only for these classes.
Lane drops and gains can be modelled easily using the link parameters.
VMS and other types of traffic control can be modeled using the VAP or COM interfaces.

See also the "..\Examples" directory on your standard VISSIM installation for examples on these topics.

Is it possible to model toll gates?  (#31)

Yes, by using stop signs with an optional time distribution.

How is the route choice determined and updated during each run?  (#29)

Route choice can be determined by the user (static routing) or computed by iterated micro-simulation using the optional Dynamic Assignment module. Routes can also be imported from the travel demand modelling software tool Visum.

Is there any specific provision or limitation for motorways? (#26)

Vissim has separate models for urban traffic and for motorways (car following models - Wiedemann 74 and Wiedemann 99). Motorway junctions can be modelled using the standard network elements. Merging areas have been tested and proved against HCM standards.

Is it possible to model junction types such as signal-controlled intersections, roundabouts, priority junctions or merges in Vissim?  (#25)

Any junction geometry can be modeled (signal-controlled intersections, priority junctions, merges including any type of roundabout) in Vissim.
The basic element of Vissim networks is a link (stretch of road) with one or more lanes or maximum 10 lanes. Links can be modeled exactly according to the geometry of the real junction with a precision down to one millimeter. Based on the link structure, network elements such as signal heads, conflict areas, priority rules etc. can be defined.

Is it possible to model designated lanes, e.g. lanes that are limited by vehicle type/class, such as bus, HOV or other managed lanes? (#24)

Yes, there are various options depending on the application:

  1. "Lane closure" in the link/connector attribute window
  2. Vehicle class specific routing
  3. Dynamic Assignment only: Connector closure

Is it possible to model pedestrian crossings? (#23)

Yes, any type of pedestrian crossing can be modelled, including zebra crossings, permitted flows (where turning vehicles need to yield to pedestrians) and signalized crossings.

See the "..\Examples\Training\SignalControl" directory on your standard VISSIM installation for examples on these topics.

What are typical times to create a network? (#22)

For a network with three simple, 4-leg junctions the geometric model will be finished within a few hours. Coding an existing signal control depends heavily on the control logic: A few minutes for a fixed time control, several hours for modeling a complex vehicle-actuated control with public transport priority.

What is the maximum size of a network that Vissim can handle? (#21)

The largest Vissim license has no built-in limit. Therefore the network size is limited only by computer resources. Apart from the hardware, the major factors that determine the simulation speed are number of vehicles simultaneously in the network, number of signal controls and number of possible paths (Dynamic Assignment).

Dynamic Assignment

Before running a simulation I get a warning message that the abstract graph in the path file is not identical with the current one. What does it mean?  (#97)

If you have modified your Vissim network and still want to continue to use an old path file, the option "Check Edges" in the Dynamic Assignment window must be enabled. Then the following errors might occur: 

  • "The abstract graph (edge structure) in file *.WEG isn't identical with the current one. Error messages are written to the *.ERR file."
  • "Old abstract graph in *.WEG: The edge 726 cannot be mapped to any edge in the current network graph." (*.ERR file)
  • "One or more paths in file *.WEG are not used anymore. Error messages are written to the *.ERR file."
  • "No edge turn in the node 10 from node 9 to node 14 could be found."

Either one of these errors means that the old structure (of the path file) cannot be safely matched with the modified Vissim network. You either need to modify your network or you need to delete the path file and let Vissim build a new one.

After a simulation run I get warnings in an *.ERR file that some paths could not be found. Does it mean that during the simulation not all vehicles were placed in the network?  (#96)

If the message looks like this:
"No path from parking lot 23 to parking lot 1594 can be used because of the following connector closures: 11880, for the following vehicle types: 100"
it is just a warning. It does not mean that vehicles are not placed into the network unless there is another message which states:
"No parking lot found from zone 19 with at least one path to destination zone 14.  Vehicles of type 100 from the matrix file *.FMA could not be placed in the network."

Why are some of the trips of the OD matrix not assigned? (#54)

Please check the following points:

  • Is the evaluation period long enough to catch all of them? If the simulation runs for e.g. 3600 seconds and you do aggregate at the end of the same period, there will almost certainly be vehicles not yet arrived at their destination parking lot.
  • Are there errors in the network topology reported to the *.ERR file? You might find out that some vehicles cannot reach their destination because there aren't any possible routes between their origin and their destination.
  • Make sure that after a modification to the network topology you delete the *.BEW and *.WEG files before running the simulation again.

I use two connectors (one for each lane) when coming from a double-lane link to a single-lane link. How can I avoid unneccesary lane change due to the fact that there are two possible routes? (#51)

This way of modeling is incorrect. You only need to have one connector linking the double-lane link with the single-lane link. Because of the route functionality of Vissim, vehicles automatically will change lanes to the one which is connected to the single-lane link - and thus there is only one possible route.

This kind of modeling is recommended both for static routes and Dynamic Assignment.

Is the cost of a route dependent only on travel time? (#49)

A generalized cost function is used instead of merely travel time. The link cost is the weighted sum of travel time, distance and link specific costs. The user has control over the weights that are used for each particular vehicle type.

Are matrix development tools available? (#48)

Matrix development tools are not part of Vissim. However, it is possible to link up with Visum which provides sophisticated handling of matrices and traffic demand.


How can I include my own pedestrian models in Vissim?  (#111)

For this task you need an animated pedestrian model and V3DM. Follow the steps listed below:

  1. Create a pedestrian 3D model in a professional 3D modeling application (e.g. Autodesk 3ds Max) that can be animated (i.e. walking).
  2. Divide one cycle of the walking movement into 20 parts in order to export 20 different 3D models, each showing a different state of the walking model.
  3. Export each state to a DWF file.
  4. In addition to the other 20 states, export the model in standstill position to a DWF file, too.
  5. In V3DM, create a new project with type "vehicle".
  6. Import the standstill model as state 0.
  7. For each exported DWF file, create a new state inside V3DM and import the corresponding DWF file.
  8. After importing all 21 DWF files, assign the relevant "vehicle" properties: 4 different colors (shirt, hair, trousers, shoes), front and rear axle positions
  9. Export the V3DM file in v3d format.
  10. Create a new 2D/3D model distribution with the exported v3d format and assign it to a pedestrian type.

When I load a DWG file as background image in Vissim I don't get the desired layout. Why? (#109)

AutoCAD® DWG files allow to store multiple layouts within the same file. In Vissim always that layout is used which in AutoCAD® was actived last.

When switching to 3D mode, the simulation turns very slow, even though I have a good graphics card. What can I do to get the best performance?  (#108)

On computers with both an on-board and dedicated graphics the graphics mode needs to be explicitely switched to the dedicated card for best Vissim performance. This can be done in the Nvidia Control Panel or AMD Catalyst Control Center which can be accessedfrom the System tray in the Windows taskbar or from the advanced Settings in the Display Settings from the Windows Control Panel.

If the Computer has Nvidia Optimus, Vissim is usually exectued by Default on the on-board graphics. To assign Vissim to the dedicated graphics chip, the graphics settings of your computer need to be modified as above.

Please check also FAQ #6.

The simulation seems to run much slower in 2D mode than before. What could be the reason?  (#107)

The 2D visualization during a simulation run can be very slow on Windows 7® if a desktop theme with Aero (translucent glass design) is selected. If a basic theme without Aero is selected (in Control Panel - Appearance and Personalization - Personalization - Theme) the 2D visualization can be up to 9 times faster.

Relevant version: up to and including Vissim 5.40

Can I use Sketchup® files with Vissim? (#100)

Yes. There are two options:

  • V3DM (optional module) can import Sketchup® files and export them as V3D files for use with Vissim.
  • Vissim from version 5.20 can import Sketchup® files as static 3D objects directly (Vissim 32-bit editions only). For vehicle models, the Sketchup® files need to be converted with V3DM in order to use them with Vissim.

(Sketchup® is a 3D modelling tool. You will find in the internet a large library of Sketchup® models incl. buildings and landmarks.)

Relevant version: from V3DM 1.40, from Vissim 5.20

What is the best video codec for recording AVI files? (#91)

We've experienced the best quality/size tradeoff with the x264 codec.

The video codecs are part of the operating system and hence VISSIM has no influence in what codecs are available or not. Make sure to have the desired codec(s) installed on your computer before you start VISSIM (you may use the links above to download the corresponding codec).

For succesful playback you need to ensure that the codec used for recording is also installed on the computer system where it is played back. For Windows 7 typically no additional installation is required for AVIs using the x264 codec.

Please note that for x264 there is a 32-bit and a 64-bit edition available. Choose that edition which complies with the application for recording/playback (e.g. x264 32-bit for VISSIM 32-bit). If you are unsure you may also install both editions.

As an alternative for playback you may use a media player with built-in codecs such as VLC media player.

[Please note that using these codecs and other software is entirely at your own risk and outside the scope for VISSIM support.]

Is there a quick way to find the delay(s) at any given intersection without inputting travel time measurements for each movement?  (#68)

Yes, using the node evaluation. For further information please refer o the PTV Vissim 6 online help > "Performing evaluations" > "Output options and results of individual evaluations" > "Evaluating nodes".

What is the purpose of V3DM? How can I include my own 3D models in the scene? (#61)

V3DM is short for "Vissim 3D Modeler" and is an additional Vissim module to

  • convert 3D objects from DWF, 3DS and SKP (Sketchup®) format to the Vissim V3D format
  • create simple 3D objects (such as houses, simple vehicles etc.) including textures

If you would like to create more complex 3D objects you need professional 3D modeling tools such as 3ds Max. For including your own pedestrian models in Vissim, please check FAQ #111.

In Vissim, static 3D objects (V3D format) can be inserted in 3D mode by right click.
Another option is to export Vissim data to 3ds Max in order to create a high-end presentation of the simulation entirely inside 3ds Max.

Is there a way to apply background images or objects in 3D mode? (#59)

Yes, any background graphics that are loaded in 2D are also visible in 3D. Static 3D objects in V3D format (Vissim 3D) may be placed anywhere in the network. Since Visim 5.20 it is also possible to place Sketchup® files (*.SKP) directly in 3D mode as static object (Vissim 32-bit editions only).

Several vehicle and static 3D models are included with the standard Vissim installation in V3D format. In addition many more models in V3D format are available for download through our service area webpage (login required).

Customized models can be created/converted using V3DM (Vissim 3D Modeler - additional module, see also FAQ #61).

Can Vissim illustrate passengers alighting/boarding trains or buses? (#57)

Yes, this is possible with the optional pedestrian module (from Vissim version 5.20).

As an alternative (without the pedestrian module), Vissim can keep track of passenger flows for each transit line and stop (without visualizing them) in order to compute the dwell times of the train/bus at a stop for realistic public transport operation.

Can Vissim use vector formats as background graphics? (#55)

Yes, among several bitmap formats (e.g. jpg, tif, bmp) also vector formats (e.g. wmf, dxf/dwg, shp, Mr. Sid) can be used for background graphics.

Please note that few vector formats currently are supported by the 32-bit version of Vissim only.


How can I measure the number of pedestrians on a ramp? (#116)

Please see the attribute "additional level" for sections. Using it you can measure the number of pedestrians on a ramp. 

Relevant version: Vissim 8.00

Can I get the LOS (level of service) out of Vissim? (#66)

Yes, using the Vissim Analyzer-Reports. Level of Service of intersections based on the Highway Capacity Manual (HCM) LOS categorization for signalized intersections (Chapter 16).

Another way to calculate the LOS is to measure delay times. Delay time = additionally required time to pass a signal-controlled intersection compared to a free through route. Matching delay and level of service is done differently in every country.

For pedestrians (optional module) an LOS color code can be displayed directly during the simulation.


When using COM from Microsoft® Excel® to start a Vissim simulation, I get the following message at the end: "Microsoft Excel is waiting for another application to complete an OLE action.". How can I avoid this message? (#71)

This warning message originates from Excel® and may come up, if the command "RunContinuous" is used. Choose one of the following solutions to avoid this message:

  1. Use "RunSingleStep" instead of "RunContinuous" in the following way: 
    for i = 0 to simulation.Period * simulation.Resolution simulation.RunSingleStep DoEvents
    next i
  2. Switch off all Excel® warnings using the VBA command:
    Application.DisplayAlerts = False
  3. Use a different programming environment.
Relevant version: from 4.00

Can Vissim model SCOOT® or SCATS®?  (#70)

You need to have a SCATS®/SCOOT® system running on your computer (this is independent of Vissim and is not distributed by PTV).
For SCATS®, several files incl. WinTraff and ScatSim are needed from the "Roads and Traffic Authority" NSW, Australia.

Relevant version: from 4.00/4.30


The background map for the map service 'Bing Maps (aerophoto)' is not shown or a warning is displayed: 'The Bing Maps License is expired.' (#115)

PTV Group has extended its contract with Microsoft to bring bing maps as background map into PTV Visum, PTV Vissim, PTV Viswalk and PTV Vistro. Customers with active maintenance contract benefit another three years without additional charges from the high resolution arials of bing maps. For the software releases in 2015 (PTV Visum 15, PTV Vissim/Viswalk 8 and PTV Vistro 4) you don’t need to do anything, bing maps will be enabled automatically. For older versions you need to update to the latest service packs of PTV Visum (13.00-21, 14.00-15), PTV Vissim/Viswalk (7.00-13) and PTV Vistro (3.00-06).

In the online help window I see the list to the left, but the page contents is not displayed. Instead, a message is shown: "The page cannot be displayed". Why? (#114)

Most likely for one of the following reasons:
- the help file is located on a network drive
- the Vissim installation path contains an invalid character. CHM help files must not contain a # character within their file or directory path. Further characters to avoid are ?, & and +.

My simulation runs very slow although there are less than 200 vehicles in the network. Sometimes it also looks as if the simulation speed varies a lot during one simulation. What could be the reason? (#101)

Check the following: 

  • Delete all speed distributions that are not used in the simulation (especially those with higher speeds).
  • Check priority rule parameters. Avoid long gap times or headways in combination with multiple look-back paths.
  • Multiple look-back paths can also be avoided by reducing the driving behavior parameter "Look back distance" for all links/connectors where applicable (e.g. at parking lots where each space is modeled on an individual link - such as for diagonal or perpendicular parking).
  • At roundabouts, reduce the amount of "small" connectors (that are used for routing purposes).

Where can I find the new features and differences between two VISSIM versions?  (#99)

This information you can find in the release notes file that is contained in every Vissim installation and service pack in the \Doc\Eng folder. It can also be viewed on our website in the service pack download area by pressing "view" in the column "Release Notes" (login required - see FAQ #77).

How can I update the Vissim Viewer version to the current service pack in order to pass it on to our customer? (#94)

Along with each service pack also a setup of the updated Vissim Viewer version is posted in the service pack download area. This site also contains instructions on how to use the updated Viewer version.

Where can I find the password for downloads of Vissim service packs? (#77)

It's contained in the file "DownloadServicePacks.txt" which is located in the  \Doc\Eng folder of your Vissim installation.

Relevant version: from 5.00

Does VISSIM take advantage of multi-core processors and a multi-processor PC? (#74)

Yes, the multi-thread capability of VISSIM takes advantage of multi-core-/multi-processor computers if a large amount of vehicles is simulated. A multi-core-/multi-processor PC is also advisable if another application should run besides a VISSIM simulation run. 

Relevant version: from 5.10

What is the procedure of contacting the Vissim support? (#72)

The technical support is an e-mail-service for Vissim and Viswalk operated by PTV that may be contacted

  • in case of program errors of the latest Vissim version that cannot be solved by a procedure offered in the manual or in the FAQ section.
  • by trained users of our clients that have signed a software maintenance contract with PTV directly.

In case you've purchased the software through any of our agents, please contact them directly for any enquiries.
Please use the support form in order to provide the relevant information. That way you contribute to a fast and efficient support service as we get essential support information already through your first contact. You can open the support form via the Vissim main window – Help – Technical Support as well.

This information must be included in an enquiry regarding Vissim or Viswalk (see also Vissim manual, chapter 16.3):

  • Name, city and country of your company
  • PTV client (TrafficID) no. and dongle no.
  • Version number of Vissim incl. service pack no. (e.g. 6.00-18 - see title of main Vissim window)
  • Operating system incl. service pack no (e.g. Microsoft® Windows® 7 Professional, 64-Bit Edition, Service pack 1)
  • Detailed description of the problem, actions that have been taken beforehand (so that we can reproduce the error)
  • The behavior you would have expected
  • Screenshot (*.jpg) of the error message (if applicable)
  • All data files necessary to reproduce the error or problem.