Porting to Idanium SQL 2131 "Runtime context in use" on Itanium 11.23 with Oracle 9.2.0.4

[Malin Goodwin]

Our software runs successfully with Oracle 9.2.0.4 on Alpha Platform OSF 5.1 and PA-RISC platform with HP-UX 11.11. We are now porting to Itanium HP-UX 11.23, and see problems.
The error SQL 2131 occurrs in the statement EXEC SQL CONTEXT USE :_osqlctx; The _osqlctx variable holds the context. The CONTEXT USE statement is executed several times in the same thread (main thread). The value of the context-variable is not changed.
After successfully performing the CONTEXT USE statement a few times the error suddenly appears.
With slight code changes (like rearranging a few lines of code) the error appears at
different times - but always on CONTEXT USE.
This code runs successfully on pa-risc and alpha platforms.

We are building with -mt flag and also tried bulding with -DPTHREAD_COMPAT_MODE.

Any tips or pointers are appreciated