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?

Most likely one of the following reasons causes the problem:

the online help is not stored on a local drive
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.