Creating and using an array flow variable – KNIME Community Hub

This workflow shows two options how an array flow variable can be created and used. In this case it is used to control the Possible Choices in the Single Selection Widget node. Tip: You can recognice that a setting option can be controlled via an array flow variable by the square brackets [ ] in the little icon showing the required flow variable type in the flow variable tab.

This is a companion discussion topic for the original entry at

Hi, why can’t this workflow be dragged & dropped into my Knime 4.7.5? Thanks, Dan

Hi @dstefane -

It should be able to. What error message are you seeing, if any? Any screenshots of the behavior?


it turned out to be a problem with the proxy:

WARN ExplorerURIDropUtil Object from URI ‘’ couldn’t be pasted Unable to tunnel through proxy. Proxy returns “HTTP/1.1 403 Forbidden”

I do not know why this suddenly happens because it was working fine some time ago.


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