Convert Workgroup PDM Files fails every time!

I have been trying to use the above to convert PDM files so that I don't increment the revision of any of the files. (there are lots of them).

I have un-ticked the pdm workgroup at start up.

I have logged in as pdmwadmin.

pdmwamin has ownership of all the files.

I have full access and can make a txt file in the temp folder.

Solidworks windows starts up and closes.

Any file I try to convert, fails with no reason given. just failed.

I can open anyone of the files, rebuild and check back in.

Any ideas while I am waiting for Solidworks to come back on this?

Thanks

SolidworksWorkgroup Pdm