Hello, Tx for your reaction Dennis. I was able to continue.  The reason I was having issues seemed to be related to the fact that the Groovy script was a standard class with a static main method. It makes sense that Nifi does not accept that I guess, but the process of diagnosing such issue might be made easier imo. It was a trial and error task, and as you suggested, by starting from an example. Anyway, I am good now 🙂 Regards Peter ... View more