Hi!
It seems like it is not possible to roll back to a working copy. Am I right? Why?
For example see part history below, a working copy was created but it is not possible (see picture below) to roll back to rev 00.B+ in this case?
/Staffan
Date & Time User Action 2010-05-19 18:11:08 pdmwadmin Bumped Rev: 00.C 2010-05-19 18:11:01 pdmwadmin Bumped Rev: 00.B+ 2010-05-19 18:10:49 pdmwadmin Bumped Rev: 00.B 2010-05-19 18:09:51 pdmwadmin Own 2010-05-14 16:05:09 Staffan Holm Disown 2010-05-14 16:04:33 Staffan Holm Change Project 2010-05-14 16:04:09 Staffan Holm Own 2010-05-12 13:03:45 Erik Hallberg Disown 2010-05-12 13:03:44 Erik Hallberg Check In Rev: 00. 
Working copies are over written each time you save and check the files in to the vault in between each major revision bump. For instance if you check in a working copy five different times there will still only be one (the latest) working copy stored in the vault for that file. Once you bump to the next major revision the working copy is deleted.
If you need to maintain a physical file for working history you may want to investigate using secondary and / or tertiary revision schemas.
Regareds,
David O.