The selected file is either not a Rational DOORS product archive or was created by an incompatible version of Rational DOORS.
Explanation
The archive file that you selected to restore is not a valid archive file because it is not in a format that Rational DOORS supports. The file is either not a project archive, or it was created by using a client that is older than version 5.
User response
Check with the provider of the file to ensure that the file was created by archiving a project in Rational DOORS client that is version 5 or later.