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I am trying to open an example of org.onsignal.rfid to read RFID with my Processing 2.1.1. But when I try to run the program, I get the following errors:
The package "gnu" does not exist. You might be missing a library.
I can open the example when I am using Processing 1.5.1. May I know what I am missing on Processing 2.1.1? Thank you.