I think the answer is no, but since we are now running 9.06, is it possible to migrate the Database from HP UX 11.31 to Redhat?
Currently this kind of migration is not supported.
An enhancement request is open, so it could be it is possible in the future:
Endianness only matters if you try to move pieces of the IDB such was DCBFs directly. If you use the MCF transport format and omnidbutil -writedb/readdb it does not matter. You can export on HP-UX and import on Windows or Linux.