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Answers
how do you export the processes? Problems could arise from different representations of a "new line" (Mac: carriage return (\r), Unix: linefeed (\n), Windows both ()) or different encodings. All RapidMiner processes are represented as XML code in the back, so you can check your current setup using the View -> Show Panel -> XML panel. You can directly copy out the raw code and send it to your classmate. She should be able to verify she's seeing the same code and paste it into the same panel, accepting it with the green checkmark in the top left corner.