BizTalk 2013 R2 and EDI correlations sets.

"Failed to initialize the correlation property name"

More detail:

Inner exception: Failed to initialize the correlation property name: ISA06 namespace: http://schemas.microsoft.com/Edi/PropertySchema from message: MessageFinal271V1.

The following correlation failed:

EDI.ST01, EDI.ISA06, EDI.ISA08

This correlation set succeeded.
 
EDI.ST01, EDIOverride.ISA06, EDIOverride.ISA08

I was doing this is a BizTalk Expression:


MessageFinal277V1(EdiOverride.ISA06) =  MessageIn276V1(EDI.ISA08);
MessageFinal277V1(EdiOverride.ISA08) =  MessageIn276V1(EDI.ISA06);



This solved the problem.