Archive is corrupted error

We have been running backups successfully to an archive when they started failing with an archive is corrupted error. We have created a new archive for backups but are trying to see if any data in the old archive is usable, however all restore attempts fail with the following error. Is there anything we can do to recover data from this archive?

Thanks, Jo

Error code: 32
Module: 7
LineInfo: f5f8cbcf76155663
Fields:
Message: Failed to perform the operation with archive 'avfs:/smb?//nas**/Archive_Other.TIB'. Error: 'The archive is corrupted.'.