Electronic Key Segment is not accepted in request path of explicit message

In A/B's Studio 5000, the PLC can can be tiggered to issue a Identitiy Reset Service Request toward an EtherNet/IP adapter via Explicit Messaging. In the request path, an Electronc key segment is encoded. The service request is rejected by the V2 slave stack with error message BAD_PATH, since it does not expect an Electronic Key segment at this point. We failed to configure Studio 5000 in a way to generate a request without Electronic Keying and it remains unclear whether or not it is capable to do this.

Anyway, according to the specification, the electronic key segment is allowed in an explicit message's request path and should be accepted and handled properly by our implementation.