It is not recommended to use the same dgn file for importing a workspace for OpenPlant Isometrics Manager (OPIM) that has been used for OpenPlant Modeler (OPM). There has been instances where a conflict arises in the following scenario:

1. Import a managed workspace for a ProjectWise project (i.e. OpenPlant_Imperial) with configuration blocKs attached to a drawing (i.e. - Empty.dgn, PlantInstances.dgn)
2. Launch OPIM in a Managed Workspace mode as described above and select the Empty.dgn to load the workspace.
3. Now launch OPM in a Managed Workspace mode and select the same Empty.dgn as for above.
4. If you try to generate an isometric with both applications open, OPIM may crash.

Therefore, it is suggested to select a separate drawing when importing a workspace for Isometrics Manager than was used to import the workspace for Modeler. Especially if both applications will be open simultaneously