Hi, My flowFile seems to be null although its being generated in a previous GetFile processor. Creating a script like yours logs me a NullPointerException error in the session.transfer line as flowFile appears to be null. I modified the script to log and in the logs I'm seeing that the flowfile seems to be null. What workaround can I make? flowFile = session.get() if (flowFile != None): log.info('is not null') # This is not being logged flowFile = session.write(flowFile, ModJSON()) else: log.info('is null') # This is being logged session.transfer(flowFile, REL_SUCCESS) # NullPointerException thrown here session.commit() ... View more