mapping problem

I am having a mapping exception as ""Cannot create target element /ns0:DataValue/RecordSet/Record/ListName. Values missing in queue "",

I am using the same Message Type for both source and target message, so the mapping is pretty straightforward. But not sure why I am getting the mapping error. I did made a fake change to the mapping and reactive it, still the same. I used a .txt for testing

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I defined the content conversion in the sender channel as below:

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Thanks for any advise.

Blue