A customer has asked me to save one of our assemblies as a ACIS .sat file

Normally we save the assembly as a part first, then save this ‘dumb part’ as a .sat file

When I go through this process on my machine I get the message below when I try to save as a sat & can’t carry on any further

My colleagues machine in the office has no problem saving the sat file. Both are running Solidworks 2014

Even if I try to save a simple Solidworks part as a .sat file I get the same message

Its a frustrating situation. Any reason this is happening on my pc & what can I do to fix it?

Ive tried testing with various settings in the Options but with no success