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To remove the last empty row do the following code:
//Remove last empty row var csv = message.getNode('/'); csv = StringUtils.substringBeforeLast(csv, '\n'); qie.debug('csv: ' + csv); message = qie.createTextMessage(csv);
Note: This will be the last mapping. If you convert the message back to a CSV then it will put the empty row back. This means that you can no longer use the message.setNode with a CSV path.