"Startup main error location: 21number: 91Description: object variable or with block variable not set"
This is almost always a permissions problem.
If you can, upgrade gINT. This has been fixed in 8.3 V8i releases (SS1) or newer.
If you cannot upgrade, grant user full control to the 2 folders where gINT is installed. User will need full control for all the sub-folders, except for the BIN folder. The path will vary, depending on the build of gINT and the operating system.
The first folder will be found in one of these places:
C:\Program Files\Bentley\gINT or C:\Program Files (x86)\Bentley\gINT or C:\Program Files\gINT or C:\Program Files (x86)\gINT
C:\Program Files (x86)\Bentley\gINT or
C:\Program Files\gINT or
C:\Program Files (x86)\gINT
This is the second place users need full control:
C:\Program Files\Common Files\gINT Software or C:\Program Files (x86)\Common Files\gINT Software
C:\Program Files\Common Files\gINT Software or
C:\Program Files (x86)\Common Files\gINT Software