AIX 5.2 64 bit optimized application dumps core

[Newuser]

I am running a C program which is optimized built, on AIX 5.2 64 bit OS. It gives Illegal instruction (core dumped). But if I build the same program with -g flag (debug build), it works fine.
Is this a known problem? what could be the solution fot this?

Thanks in advance.

[anonymous]

Install the latest patch. Look at APAR IY21447.

[Ruth]

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Thank you