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ORA-08412:

error encountered in WMSGBSIZ, size for WMSGBLK is not big enough for warning message
Cause: The WMSGBSIZ is the maximun size for warning message block, it is recommanded to be 1024 bytes to 8 kbytes.
Action: Defined WMSGBLK of size between 1k to 8k bytes and update the WMSGBSIZ to the sizeof(WMSGBLK).