Problems when exporting from 8.1.6 and importing on 8.1.5

Hi Folks,

I try to import an exportfile generated with Oracle 8.1.6 into an 8.1.5 database. The error messages are the following:

IMP-00010: not a valid export file, header failed verification Cause: Either the file was not generated by Export or it was corrupted. Action: If the file was indeed generated by Export, report this an Import bug
and submit the export file to customer support.

IMP-00021: operating system error - error code (dec num, hex 0x num) Cause: An operating system error has occurred. Action: Look up the referenced message in your operating system-specific Ora-cle documentation and take appropriate action.

IMP-00000: import terminated unsuccessfully Cause: Import encountered an Oracle error. Action: Look up the accompanying Oracle message in the ORA message chap-ters of this manual, and take appropriate action.

Well, the third one is clear.
But what do the two above mean?
The file was generated by export and there have been no errors at the file transfer.

I hope that someone has a suggestion.

Greetings
Markus

-- 
Markus Böhmer
SSI Schäfer Shop GmbH
mailto:markus.boehmer_at_schaefer-shop.de