The right-hand operand of a timestamp operation is not valid.
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Cause . . . . . : The right-hand operand of a timestamp addition or subtraction operation must be built-in function %MSECONDS, %SECONDS, %MINUTES, %HOURS, %DAYS, %MONTHS, or %YEARS. The operation is ignored.
Recovery . . . : Correct the right-hand operand of the timestamp operation. Compile again.
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