ORA-08458: invalid format parameter

admin

ORA-08458: invalidformat parameter
Cause: The format parameter passed to a UTL_PG conversionroutine was
invalid. The format parameter should have been built by a prior call to either
MAKE_RAW_TO_NUMBER_FORMAT or MAKE_NUMBER_TO_RAW_
FORMAT.
Action: Checkto be sure that the format parameter was built by MAKE_RAW_
TO_NUMBER_FORMAT or MAKE_NUMBER_TO_RAW_FORMAT, and that it
was not accidentally overwritten or modified by the PL/SQL procedure.