Oracle / ProC Precompiler Question

The project I am working on is converting all of it’s Oracle Form products from 5.0 to 6i. We also use several C dlls that use the Oracle ProC Precompiler. Currently, we the Sqllib18.lib and Sqxlib18.lib files for the Precompiler. However, it seems that these two files don’t properly precompile for 6i. Does anyone know either how to tweak these files to work or what files need to be used in their place (and where I can get them)?

It’s a contract project, so upgrading to the most current versions of anything really isn’t an option. Those that have done DoD work may be able to relate.

Thank you for any help.