I've created a Swift VSI & VSM using R/R Pairs.Once the service is deployed, I send a message using exactly the same as the "request" file from R/R Pairs but the message that Virtual Service publish is "No response found for the request to the DevTest VSE system".When I checked the VS log, I can see the received message has no difference compared to the sended message.
What can be causing this?
Have you had the chance to verify the Inspection View?
Depending on the log level set to your VSE you can verify what is not matching.
There is some information how to use the Inspection View for debugging in the link below:
How do you use the Inspection View and options to - CA Knowledge
Hope it helps.