IDAETERR46 - DATE: month invalid

Reason:

A date function found a month specification is invalid because:

A non-digit was found in a MM specification
Input date contains two different month specifications (any non-equal combinations of M, MM, MONTH, LCMONTH, MON, and LCMON)
Input date contains an unrecognized month specification (no match to site-defined month table was found)
Input date contains a DDD specification (day 1-366) but no valid year specification, so the month cannot be determined

Action:

Review the input-date parameter of the date function in error.