The Factor 2 entry of an ADDDUR operation must contain a numeric duration.
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Cause . . . . . : The Factor 2 entry (positions 36 - 49) of the ADDDUR operation must contain 2 parts separated by a colon. The first part must be a variable, literal, or constant which is numeric with 0 decimal positions. The second part must be a duration which is compatible with the data type of the result field (positions 50 - 63). The specifications is ignored.