Ciao Marco, sorry for not acing replied yet but in the past few weeks I have same troubles… Anyway I tried the new release (2.2.3) and: - I found this error: Unhandled exception in thread started by > Traceback (most recent call last): File "/afs/cern.ch/work/f/fgiuli/public/MG5_aMC_v2_2_3/madgraph/various/cluster.py", line 543, in launch returncode = exe(argument) File "/afs/cern.ch/work/f/fgiuli/public/MG5_aMC_v2_2_3/madgraph/interface/amcatnlo_run_interface.py", line 112, in compile_dir stdin = open(input), stdout=open(pjoin(this_dir, '%s.log' % test), 'w')) File "/afs/cern.ch/work/f/fgiuli/public/MG5_aMC_v2_2_3/madgraph/various/misc.py", line 516, in deco_f return f(arg, *args, **opt) File "/afs/cern.ch/work/f/fgiuli/public/MG5_aMC_v2_2_3/madgraph/various/misc.py", line 546, in call return subprocess.call(arg, *args, **opt) File "/usr/lib64/python2.6/subprocess.py", line 478, in call p = Popen(*popenargs, **kwargs) File "/usr/lib64/python2.6/subprocess.py", line 642, in __init__ errread, errwrite) File "/usr/lib64/python2.6/subprocess.py", line 1234, in _execute_child raise child_exception OSError: [Errno 8] Exec format error INFO: P2_ddx_epemssx done. DEBUG: Some jobs have been lost. Try to recover (even if I set, in the mg5_configuration.txt file, the run_mode = 0) - The program stops after compiling the P2_uxu_epemddx directory. Francesco On 5 Jan 2015, at 09:51, marco zaro <