Last week I posted some general information about ArcGIS connections. Coincidentally, a customer was using the ArcGIS Provider that week and experienced a specific issue that, to this point, was undocumented. Here it is, exclusively on Being Civil!
When you use the Add ArcGIS Connection on 32-bit AutoCAD Map 3D to connect to a file geodatabase, you encounter the error "Failed to connect", with the following details:
Create Factory failed "Dir: C:\... File: GIS data Code: Nothing
This is happening even though you have a valid ESRI license available to you.
Note: The file geodatabase can be accessed successfully when opened in ArcMap (meaning the file is not corrupt).
Cause: This can happen if the file geodatabase's directory extension is incorrect.
Solution: Change the directory name in which files (*.gdbtable) are stored to add suffix ".gdb".