A KFLD operation corresponds to a null-capable field.
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Cause . . . . . : Keyed operations are not allowed when a KFLD operation corresponds to a null-capable field and the ALWNULL(*INPUTONLY) or ALWNULL(*YES) compile option is specified. The specification is ignored.
Recovery . . . : Remove the specification or specify the ALWNULL(*USRCTL) compile option. Compile again.
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