ORA-07445: exception encountered

I am getting the following error during a complex query in Oracle 9.2.4. I cannot find a solution to this error on Metalink or on the web. The next patch does not appear to address the problem. Can anyone help?

ORA-07445: exception encountered: core dump [opidfn0()+4200] [SIGSEGV] [Address not mapped to object] [0x4] [] []

Thanks!
Ron

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