@koshay    This error is telling you that the user running the NiFi process is unable to see that file. ...java.nio.file.NoSuchFileException If the file really does exist at "/cygdrive/Windows/System32/LogFiles/Firewall/pfirewall.log", then the issue is more likely permissions on one of the directories in that path preventing the NiFi java process user from being able traverse that directory tree to the log file.    If the NiFi Java process user was able to traverse that entire directory tree, we would expect a different error related to permissions on the log file.   Hope this helps, Matt     ... View more