When ExtendSim launches it requires the loading of certain files and it expects that those files have been installed at specific locations. If needed files don’t have the correct permissions, or if ExtendSim can’t find the files, ExtendSim will not launch properly. End users must have physical (correct account) and permitted (read/write or full) access to the ExtendSim folder that contains user-modifiable files such as example models and libraries. In addition, so that ExtendSim will know where those needed files are located, the installer places a text file (ExtendSimDocPath.txt) in the Program Files/ExtendSim folder.

Error messageThe most common reasons why user-modifiable and other necessary files were not correctly installed are:

Someone from IT or an Admin installed the user-modifiable files in a folder under their account rather than in a folder accessible by the end user.

The folder containing user-modifiable files does not give the end user or ExtendSim the correct permissions.

The folder that contains user-modifiable files has been moved after installation, so ExtendSim is looking for files at the wrong location.

Error messageIf ExtendSim issues error messages such as “Documents folder not found” or “lp_solve[0] Error…system error code:2” as it tries to launch or gives a similar error message when end users try to open model or library files:

Verify that user-modifiable files such as examples and libraries are installed in a folder that is accessible by the end user (by default, the UserName/Documents/ExtendSim10 folder).

Check the folder permissions where user-modifiable files and extensions are installed. End users need read/write or full access to that folder, depending on its location, so they can open, run, and save models.

So ExtendSim can properly open needed files, right-click its icon and select Run as Administrator as you launch it.

If the user-modifiable files were moved after installation, modify the file ExtendSimDocPath.txt (located by default at Program Files/ExtendSim10) to indicate the new location.