IV2013 SP2 - Error when trying to Restore oldversion to Current Version

[RobSinglehurst]

I must have done a Save Copy As on an iam a while back but forgot to open the copy, carried on working on the original and saving the changes. I always keep "oldversion" files and so thought I'd just find where it went wrong and restore the oldversion to the current version. I can open the oldversion iam fine but if I try to restore it I get the following error,

I have overcome this in the end by doing a Save Copy As on the oldversion iam to my working directory. I don't have Vault or anything and am just a single user but have never had the above error before.

What would cause the above error though when the oldversion file opens fine?

[bob_holland]

Rob,

This kind of corruption usually happens during a failed save of the file.

Here is post by a colleague the goes into more detail on how Inventor handles IO.

http://forums.autodesk.com/t5/Inventor-General/Inventor-project-file-keeps-switching-to-default/td-p...

Thank you.

[RobSinglehurst]

Thanks Bob,

Like I said I have overcome it by doing a Save Copy As of the oldversion file and I stripped off the version number from the end of the file name.  I had already renamed the original file (ie non oldversion) in case there was an issue with that file already being there when the oldversion was restored.