ORA-08451: invalid specification of DB in picture mask
Cause: The DB suffix was incorrectly specified in the picture mask parameter passed to a UTL_PG conversion routine. The DB suffix can only appear at the end of a picture mask.
Action: Correct the picture mask parameter.
ORA-08452: specification of E in picture mask is unsupported
Cause: The floating point exponent symbol ‘E’ was specified in the picture mask parameter passed to a UTL_PG conversion routine. The floating point data type is currently not supported by the UTL_PG conversion routines.
Action: Correct the picture mask parameter, and the data, if necessary.
ORA-08453: more than one V symbol specified in picture mask
Cause: The picture mask passed to a UTL_PG conversion routine contained more than one decimal point indicator (‘V’). Only one decimal point indicator is allowed in the picture mask.
Action: Correct the picture mask parameter.

ORA-08454: more than one S symbol specified in picture mask
Cause: The picture mask passed to a UTL_PG conversion routine contained more than one operational sign indicator (‘S’). Only one operational sign indicator is allowed in the picture mask.
Action: Correct the picture mask parameter.
ORA-08455: syntax error in CURRENCY SIGN environment clause
Cause: A syntax error was found in the CURRENCY SIGN environment clause parameter passed to a UTL_PG conversion routine. Valid specifications are: CURRENCY SIGN IS x where x is a valid currency sign
Action: Correct the environment clause parameter.
ORA-08456: no sign in picture mask but SIGN clause in mask options
Cause: The picture mask parameter passed to a UTL_PG conversion routine contained no sign symbol (‘S’, ‘+’, or ‘-‘), but the mask options parameter contained a SIGN clause. A sign symbol is required in the picture mask parameter when the mask options parameter contains a SIGN clause.
Action: Correct the picture mask parameter or the mask options parameter.

ORA-08457: syntax error in SEPARATE CHARACTER option of SIGN clause
Cause: A syntax error was found in the SEPARATE CHARACTER option of the SIGN clause in the mask options parameter passed to a UTL_PG conversion routine. Valid specifications are: SEPARATE SEPARATE CHARACTER
Action: Correct the mask options parameter.
ORA-08458: invalid format parameter
Cause: The format parameter passed to a UTL_PG conversion routine 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: Check to 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.
ORA-08459: invalid format parameter length
Cause: The format parameter passed to a UTL_PG conversion routine was not the correct length. Format parameters must be 2048 bytes in length.
Action: Check to 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.
ORA-08460: invalid environment clause in environment parameter
Cause: The environment parameter passed to a UTL_PG conversion routine contained an unsupported or invalid environment clause. Only the CURRENCY SIGN and the DECIMAL-POINT IS COMMA environment clauses are supported.
Action: Correct the environment parameter.

Above are list of Oracle Database Errors or Warnings from Error ORA-08451 to ORA-08460 received while performing certain operation against Oracle Database or related products.

What are Oracle Database Error Messages?

Oracle Error Messages may be returned while using products which are part of Oracle Database.  Each Oracle Database Error or Warning Message mentioned above contains the Warning or Error Message Statement, a short explanation of the probable causes of the Error message, and a recommended action.

Hope this was helpful.

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SQLServerF1 Team
Information about Oracle Database Error Messages or Warning Messages on Windows and Linux Operating Systems.