Please help to restore the file created in AutoCad 2007, SPDS 4. Standard methods of recovery is impossible. File's. bak was not, in the AutoSave folder is not found, unfortunately. The file was damaged under the following circumstances: when the file was opened, the optical disk started, which at some point hung, it was necessary to resort to Reset; after rebooting, AutoCad as usual offered to restore the file, but starting the recovery broke at some percentage and gave something like: "the file is corrupted and can not be restored". Thanks in advance!