I have been trying to open some part documents that I saved on Tuesday, but when I go to open them today an error message pops up that reads "Cannot open (part doc name). Future Version" What is confusing me is that I have been using Solidworks 2008 the entire time I have been creating and editing these documents, so opening the part in the same edition of SW that it was created in should technically not be a problem...so why is it?