Hi - since upgrading to 2020, I've had a problem where SW won't save a file, even though it seems to save the file.  

For example, I will make a revision to a part, click Save, and the part seems to save fine.  Then close Solidworks.  Then re-open the file.  And the revision is not there...  

Same thing happens with Assemblies.  Same thing happens with the Save All command.

At first, I thought I was doing something wrong.  But this has been happening for weeks, and it happens over and over.  

Has anyone else seen this?  I am using PDM, for what it's worth.

Thank you!

Jon