It could be that something is wrong with the Environment.xml file. This resides in C:\Users\[username]\AppData\Roaming\WindSim\1200 folder. The beginning of this file should look something like this:
<?xml version="1.0" standalone="yes"?>
<Environment xmlns="Environment.xsd">
<Installation>
<Version>12.0.0</Version>
<Organization />
<User />
<DateTimeInstalled>2024-04-30T16:00:09.324+02:00</DateTimeInstalled>
<UserDataFolder>C:\Users\test\Documents\WindSim Projects</UserDataFolder>
<WindSimFolder>C:\Program Files\WindSim\WindSim 12.0.0</WindSimFolder>
<VisualizerProgramFolder>C:\Program Files\WindSim\WindSim 12.0.0\bin\GLview</VisualizerProgramFolder>
<DebugLevel0>0</DebugLevel0>
<DebugLevel1>0</DebugLevel1>
<DebugLevel2>0</DebugLevel2>
<DebugLevel3>0</DebugLevel3>
<Language>en</Language>
The important fields here, are the WindSimFolder, VisualizerProgramFolder, and the Language. Make sure these fields are presented and looks good in the Environment.xml file. If the problem persists then the problem isn't in the content of the file, but rather that WindSim can't find it. If that is the case, it could be due to WindSim being installed with a different account rather than the one currently logged in.
Figure: error message screenshot
