Mandatory Loop is missing. Loop Section=<Loop Section>, Tag=<Loop Tag>, Ordinal=<Ordinal Number>.
Description
A loop defined as "Mandatory" (M) or "MUST USE" in the implementation guideline is missing in the document. The Loop Section describes the loop hierachy that the missing loop is located under. Loop Tag is the tag or label of the loop; if not present, then the Segment ID of the loop trigger. Ordinal Number is the unique number assigned to the loop.