Yes, you are right, That is what i meant. I haven't played with the sandbox, but the key would be to make sure that the user NiFi uses to run has access and permissions to the resources you are adding to the processor. Executestreamprocessor will have the same issue if the path is wrong or non existent in the server. I would first try to find out what user is used to run nifi (ps -ef would be your friend here). Then i would make sure that that user has access to the path in the console. (Use 'ls -l path') from the home directory. Path in this case would be both the path of the executable, and the path of the working directory (Make sure both are accessible) Lastly, try to execute your script from the command line. Thanks! Regards ... View more