I have a block that I want to essentially be a source block in RFNoC (outputting data from a ROM), but when I go to probe, I get this error: RuntimeError: LookupError: Path not found in tree: /mboards/0/xbar/dataGenerator_0/ports/in

Is this because I set it up without sink input? Is there any way around it? I think the solution is to put a sink in the rfnoc/blocks/ XML file but NOT the grc XML file, is that right?

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