NX: Error recovery completed for the following error: An operation was attempted on an invalid or unsuitable OM object

There are two possibilities , that caused this error message.

Some files in nxcad - scratch folder may be corrupted, that causes some problem.
The solution is, close NX and NX PDM, clean the scratch folder and restart NX again.

Sometimes, if the components are loaded in lightweight representation, and if any lightweight body has problem, then this error will appear.
The solution is to change the representation of all components into "exact" and continue working with the operation.

If you have any part cleanup tool, then it will help to resolve this issue.