Wiki: MTH_OPERATOR

This operator takes the month portion of Operand 2 and stores the result in Operand 1.

Statement: Store the Month portion of the employee’s Seniority Date into Variable Month.

Line	CMD	OT	Operand 1	OPER	OT	Operand2	OT	Operand3	If Goto	Else GoTo
00010	LET	V	MONTH	MTH	DB	EEM.SENIORITY_DATE			99999
99999	EXIT								99999

The result of the MTH Operator is a 3-character alpha value, NOT a number (i.e. Dec NOT 12)