...already existing archve. ERROR

All,

Getting the following error when trying to change transition from Released to ECO.  Happening only on a couple of pdf files, thus I can not check out, get latest, change state etc.

Could not perform transition on file 'C:\... .pdf'

The archive Server tried to create an already exisitng archive.

What is this error all about?  No error code?  Any suggestions as to why it happens, how to resolve?  Additionally, only happening at 1 of 3 sites which we have EPDM 2008.  No plans at this time to update.

Thanks, Tim...

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