I am getting the same 'No acceptable project file was found' error. We just upgraded from 2010 Vault to 2011 Vault Pro. In that process we planned on restructuring somethings in the vault. The thought was I would be able to drag folders within the Vault Explorer to their 'new' location and all links would stay conected. We every item I try to drag and drop gives me the project file error. So, I understand the file is not found. Can put a new project file in place of the missing one and be back to normal. Or do I have manually resolve everylink in the vault? I really hope not. Is there something else I should look at.
Just replying to say I think we dicovered our problem. Our 'new' locations .ipj file didn't include the 'old' location. We used the same .ipj just modified. In doing so we removed the 'old' location from it. Doing so prevented us from dragging items, in the vault explorer, from outside the project file's folders to inside the project file's folders. Anyway, source of the problem discovered and a plan of attack is being planned.
I have the same problem and found out (together with Andrea Mazzoldi from Autodesk) that Inventor are writing some temp files in "My Document". We have a small buisness server and have "My Document" at the server insted of at C:\. That is the problem. Autodesk will try to fix it, but another way to solve the problem is to log on the computer local (where "My Document" is on C:\) and now its possible to move files again... I hope it works...
Kim Christoffersen
Stirling DK