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ORA-09940:

ORACLE password file header is corrupt
Cause: The header of one of the password files was not in the format that ORACLE expected.
Action: Check the headers of both files. The header should be in the format "FILE VERSION: N.N.N.N.N EXECUTABLE VERSION: N.N.N.N.N" where N is a number. Remove the corrupt file(s) and re-run "orapasswd".