Hi pharoers, I am playing with OSProcess. I am using an example, and I am annoyed with a strange bug: Here is the code I want to execute, and does not work: ==== |thread process output| myCmd := 'rostopic bw /turtle1/pose'. thread := [process := (PipeableOSProcess command: myCmd) ] fork. 3 second wait. output := process upToEnd. output inspect. thread terminate. === 'rostopic bw /turtle1/pose' is a command that is a loop displaying the current bandwidth of a ROS process. In a terminal, it works fine. With OSProcess the output value is empty. My source code is correct: if I replace myCmd by : myCmd := 'ping localhost'. It is a loop too, and it returns a correct string. I have clearly no idea of where I have to search... Any help or discussion about that would be great :) Thank you, Oups, some infos: I am using Ubuntu 14.04 Pharo3.0 with Moose 5.0, latest update: #30863 The script I use (rostopic) is a python script (does it impact ?) -- ~~Jannik Laval~~ Ãcole des Mines de Douai Enseignant-chercheur http://www.jannik-laval.eu http://www.phratch.com http://www.approchealpes.info http://car.mines-douai.fr/