FRM-50006: Legal characters are 0-9 + and -.
Cause: You entered an unacceptable character in a number item.
Action: Enter a valid number. A valid number has digits 0 through 9. A number may be preceded by a plus (+) or minus (-) sign. If the message allows it, a number may contain one decimal point at any location, except before the sign.
Trigger: ON-ERROR