Add + " & timeout 15" or + " & pause" to the string you pass to os.system:
os.chdir('C:/Abaqus_JOBS' + JobDir) os.system('abaqus job=' + JobName + '-3_run_rel2 user=FalseworkNmm41s interactive' + " & timeout 15") consider using popen (Difference between subprocess.Popen and os.systemDifference between subprocess.Popen and os.system) instead.