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ORA-08443:

syntax error in BLANK WHEN ZERO clause in mask options
Cause: A syntax error was found in the BLANK WHEN ZERO clause in the mask options parameter passed to a UTL_PG conversion routine. Valid specifications are: BLANK ZERO BLANK ZEROS BLANK ZEROES BLANK WHEN ZERO BLANK WHEN ZEROS BLANK WHEN ZEROES
Action: Correct the mask options parameter.