IGZ0049W   A zero base was raised to a zero power in an exponentiation expression in program program-name at displacement displacement. The result was set to one.

The value of zero raised to the power zero occurred in a library routine. The value of zero raised to the power zero is undefined in COBOL. If a SIZE ERROR clause had appeared on the statement in question, the SIZE ERROR imperative would have been used. However, no SIZE ERROR clause was present, so the value returned was one.