Help! OCIInitialize coredump problem

On AIX, the program called OCIInitialize() at the very beginning, and it coredump. See below.

It is weird that the program works well wth one user, but does not with another one.

I tried to compare environment setttings, such as LIBPTAH, ORACLE_HOME, stack/datasize limits, but find nothing different.

Any advice on this?

thanks!

(dbx) where
skgfsio(??, ??, ??) at 0x900000016083ef8
skgfqio(??, ??, ??) at 0x9000000160838f4
sdbgrfbibf_io_block_file(??, ??, ??, ??, ??, ??, ??) at 0x90000001607e258
dbgrfwbf_write_block_file(??, ??, ??, ??, ??, ??, ??) at 0x900000014ac4bf8
dbgrmflwp_write_page(0x0, 0x0, 0x0, 0x100000001, 0x110361000, 0x100000001000) at 0x900000014c53fa8
dbgrmblwp_write_page(??, ??, ??) at 0x900000014c2a96c