Oracle Error Code Detail ORA-01481

Code:		ORA-01481
Description:		invalid number format model
Cause:		The user is attempting to either convert a number to a string via TO_CHAR or a string to a number via TO_NUMBER and has supplied an invalid number format model parameter.
Action:		The user is attempting to either convert a number to a string via TO_CHAR or a string to a number via TO_NUMBER and has supplied an invalid number format model parameter.