Factor 1 corresponds to a null capable key field in the file or record.
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Cause . . . . . : Keyed operations are not allowed when the field specified as the Factor 1 operand corresponds to a field which is null capable and the ALWNULL(*INPUTONLY) or ALWNULL(*YES) compile option is specified.
Recovery . . . : Remove the specification or specify the ALWNULL(*USRCTL) compile option. Compile again.
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