Hi, On Mon, 10 Feb 2014 19:07:20 -0800 (PST) jackywgw <jackywgw at gmail.com> wrote: > Hi, I encounter the same problem, Can you tell me if I need to excute > shell command in multi-threaded programs, how should we do since we > can't use system? thanks > you have to use semaphores to serialise the calls. Erich