I am relativly new to this, so excuse me if i am asking a dumb question

HL7 schema is 2.4

When a HL7 message comes in and in the PID segment on spot 4 the word "Relation" is written, i want to filter out those messages through a Router Rule.

I have come up with several rules (when conditions), here are some examples.

HL7.{PID:4} CONTAINS "Relation"

or

HL7.{PID:AlternatePatientIDPID(1).ID} CONTAINS "Relation"

I have tried a lot of different Rules, but no luck yet.

But every time i test a massege what contains the word Relation in de PID segment on spot 4 it states ".....no whens matched...."

What am