Steps to migrate Pro*C from Oracle 8i to Oracle 9i

Hi,
I am trying to migrate legacy pro*c code from oracle8i (32 bit) to oracle9i (64 bit).
Where can I find the steps for the same.
I tried to compile the code as it is by using ORACLE_HOME/lib32 during compilation, but it still gives ELFCLASS64 error.
Please help.
Regards,
Gurudatta

There is no specific guide for a "combination". A migration is done using a heterogeneous system copy using R3load. This is convered in the normal system copy guides at
http://service.sap.com/systemcopy
For a migration of a production system you need to have a certified migration consultant on site (see http://service.sap.com/osdbmigration), otherwise you will loose support for the target platform.
Markus

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