This is a bug in some versions of the Arduino IDE. Try updating to the version 1.6.12 or further.
You have a different solution? A short tip here would help you and many other users who saw this issue last week.
- java.io.IOException: Cannot run program "nohup" (in directory "/home/jenkins/workspace/i40e/pipeline"): error=20, Not a directory at java.lang.ProcessBuilder.start(ProcessBuilder.java:1131) at java.lang.ProcessBuilder.start(ProcessBuilder.java:1074)