This was a more common problem in earlier years of SW and normally results from an abnormal closing of the SW file. Whether this is the fault of SW, Microsoft, network, etc is unclear but I have not run across it recently.
I have used Solidworks here at this company since Solidworks 98 we quit updating the software at around 2008 and I had never seen this issue
until we upgraded to SW 2012.
We are not using the PDM Vault all of our work is just done across the network.
The company does not understand why we would need to have a server with PDM for engineering.
Well thanks for replying.