Hello @NThompson002
After your join-node, where you join all the Data Layer Reads together in one payload, you will get a payload similar to this:
msg.payload after join
msg.payload = {msg1.topic : msg1.payload, msg2.topic : msg2.payload, ...}
The values you get as the identifier for the payloads (the topics from the single reads) have to match with the columns you have in your csv node. In my case that would be: sdk-cpp-registernode/myFloat, sdk-cpp-registernode/myInt64, sdk-cpp-registernode/myString.
Colums in CSV node
You could also think of changing every msg.topic after the single Data Layer Read nodes, so you will get better readable columns.
Best regards,
Nick
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