Set Flow without using Function node

If I understand correctly, the use of the Function Node should be avoided as it uses many resources.

What is the correct way to Set a Flow without using a Function Node?

I thought it could be done by using a Change Node, however when I tried it didn't work.

I tried using the Rule Set msg.payload to flow.DailyPumpTest.
The message payload is coming from a Dashboard dropdown.
Currently the output message from the Change Node is "undefined".

Try the other way round. Set (the) flow.DailyPumpTest TO (the value of) msg.payload

Yes, that will do it. Makes me look a bit silly.

Thank you for you timely help :slight_smile: