System for interrupting program operation when an out-of-range value is encountered to correct a data value

摘要

System for suspending operation of a program after detecting that an instruction is executing with an operand assuming an out-of-range value such as a year value out of the range of the program. After suspending operation, the reason for the suspension is determined based on a set of rules and the proper result of the instruction is determined and inserted. If the reason for the suspension was a date value was out of range, the date value is put in a different format. Operation of the program may then resume.