Resulting indicator is not allowed for TESTB operation testing one bit; defaults to blanks.
20
Cause . . . . . : A Low-Resulting-Indicator entry (positions 73 - 74) is not blank for a TESTB operation that tests the state of one bit.
Recovery . . . : Omit the Low-Resulting-Indicator entry (positions 73 - 74). Compile again.
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