The subfield or parameter definition is not specified within a group.
20
Cause . . . . . : The Definition-Type entry (positions 24 - 25) is blank, indicating a data-structure subfield definition or a parameter definition, but the specification is not within a data structure or list of parameters. The Definition-Type entry defaults to S indicating a stand-alone field definition.
Recovery . . . : Change the Definition-Type entry to S, or move the specification to within a data structure or a list of parameters. Compile again.
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