Hello, I'm trying to generate multiple FlowFIles out of one input (using ExecuteScript with Jython), because I need to split a "Comment"-Entry into multiple information. Currently I'm tryining to send out each flowfile in a for-loop with this Statement for i in iterTyreFinder: ....SomeMagic flowFile2 = session.write(flowFile, PyOutputStreamCallback()) session.transfer(flowFile2, REL_SUCCESS) Where the OutputStreamCallback only writes the text of an variable out # Define a subclass of OutputStreamCallback for use in session.write() class PyOutputStreamCallback(OutputStreamCallback): def __init__(self): pass def process(self, outputStream): outputStream.write(bytearray(ioV.outputText.encode('utf-8'))) # end class When I run this code, some Flowfiles success, and other fails, with this Exception. "Failed to process session due to org.apache.nifi.processor.execption.ProcessException: javax.script.ScriptException: org.apache.nifi.process.execption.FlowFIleHandlingException: ..... ..... is already marked for transfer in <script> at line number 196: javax-script.ScriptException:" Seems that only one flowfile can be outputted for one input flowfile. Is there another way to solve this? Splitting before ExecuteScript is not possible, because I do the Regex"Magic" inside the ExecuteScript with the Comment-Entry. Thanks for any help. Christian ... View more