Problem Description

Installed GEOPAK SS4 08.11.09.789 with Microstation SS3 version 08.11.09.655 and GEOPAK SS2 and when I open Microstation the program runs but I get the follow text window error that I can not close. 

OS could not load C:\Program Files (x86)\Bentley\MicroStation V8i (SELECTseries)\Descartes\mdlapps\geodtmcore.dll, error 127.

MDL Loader: Unable to load library (DLL or MDL shared library) geodtmcore

Steps to Resolve

Workaround 1:

This is not necessary a resolution but a test scenario for a workaround.

1.  Uninstall everything and run CCleaner to clean out registry.

2.  Install Microstation 08.11.09.655 and GEOPAK 08.11.07.615 (if you do not need SS2 GEOPAK then skip the to step 4)

3.  Test to see if it works.

4.  Install GEOPAK 08.11.09.789 without Descartes option.

5.  Test to see if it works.

Workaround 2:

You get this message when Descartes is uninstalled and/or geodtmcore.dll, geodtmcore.ma is not found in folder C:\Program Files (x86)\Bentley\MicroStation V8i (SELECTseries)\Descartes\mdlapps\

If you don’t use Descartes, then reset the MS_DGNAPPS configuration variable value.

1. Open MicroStation
2. Go to Workspace > Configuration > All (Alphabetical)
3. Search for MS_DGNAPPS configuration variable
4. Click on Edit button
5. Remove the string "$(MS_DESCARTESDIR)mdlapps\geodtmcore.ma" from the New Value section
6. Click OK, OK, Yes buttons
7. Go to File > Save Settings
8. Restart MicroStation.