Oracle® Database 11g / 12c / 18c error codes IMP-00012: invalid export mode (character) in header

IMP-00012: invalid export mode (character) in header

Oracle Error Code: IMP-00012

Cause: The Export mode specified in the export file header is invalid.

Action: Check the export file to see if it was corrupted. If it was not, report this as an Import bug and submit the export file to customer support.