ISM Clean Install

If you are having a problem with ISM on your machine I would recommend doing a clean install of both the ISM Revit Plugin and iTwin Analytical Synchronizer (previously Structural Synchronizer). 

How to

1. Go to Control Panel and uninstall iTwin Analytical Synchronizer and ISM Revit Plugin.
2. While you have Control Panel open check and see if Microsoft .NET framework 4.8 is installed. (It is located in Turn Windows Features On or Off.) If it is not, you can download it from here:
   Download .NET Framework 4.8 | Free official downloads (microsoft.com)
3. Next go to each of the directories shown below and if they still exist delete them.
   C:\Program Files\Bentley\Engineering\iTwin Analytical Synchronizer CONNECT Edition
   C:\Program Files\Bentley\Engineering\ISM Revit Plugin CONNECT Edition
   C:\Users\your.name\AppData\Local\Bentley\IsmEngine
4. Reinstall iTwin Analytical Synchronizer and the ISM Revit Plugin.
5. Restart your machine.

See Also

Integrated Structural Model Home