I have a theory that I could use an HL7 Data Transformer in a rule without specifying a specific DocType. I want to use the same DTL for a variety of different DocTypes. Here is my very simplistic DTL so far:
ClassExtendsParameter1For the more visual people:
But when I test this with any HL7 message I get the error
ERROR <Ens>ErrGeneral: Cannot recognize path before DocType is set
Is there not a way to write a DTL for any HL7 message without specifying the DocType? And also, am I referencing the field correctly with target.{MSH-4}

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