Hello I'm trying to execute system calls via the command "System" (e.g. System "del tmp*.jpg";) but it does not work. There is also no error message in the message console. I'm running Gmsh 2.4.2 and 2.5.0 under Windows Vista and Windows 7. Is this a bug or do I have to do something different? Thanks a lot for your help! Best regards, Michael Asam