IGZ0167S   A reference modification start position value of start-position and length value of length on line line-number caused reference to be made beyond the rightmost character of the function result of function-result.

The starting position and length value in a reference modification specification combine to address an area beyond the end of the reference modified function result. The sum of the starting position and length value minus one must be less than or equal to the number of characters in the reference modified function result.