To preserve the integrity of your multi-user model, you need to remove any inconsistencies from the multi-user database at regular intervals, for example once a day. This may also fix assemblies with no main part and drawings of unknown ( U ) type.
We recommend you to check the multi-user database in single-user mode.
Have all other users exit the multi-user model.
Save your model to receive the modifications of other users.
Exit the model.
Open the model in single-user mode.
Exit the model without saving.
Re-open the model.
On the File menu, click Diagnose & Repair and in the Model area, click Repair model.
Save the model.
Exit the model.
Re-open the model in the multi-user mode.