Dear relax-users, When I run mf-multimodel.py without Monte Carlo simulations, relax runs okay. But when I incorporate Monte Carlo simulations, relax encounter problems from m5 as follow, while no errors for m0 to m4. Any ideas what isthe problem ? relax> monte_carlo.error_analysis(run='m5', prune=0.0) Traceback (most recent call last): File "/usr/local/bin/relax", line 454, in ? Relax() File "/usr/local/bin/relax", line 166, in __init__ self.interpreter.run() File "/data2/usr-local/relax-1.2.9/prompt/interpreter.py", line 213, in run run_script(intro=self.relax.intro_string, local=self.local, script_file=self.relax.script_file, quit=1) File "/data2/usr-local/relax-1.2.9/prompt/interpreter.py", line 388, in run_script console.interact(intro, local, script_file, quit) File "/data2/usr-local/relax-1.2.9/prompt/interpreter.py", line 340, in interact_script execfile(script_file, local) File "mf-multimodel.py", line 45, in ? monte_carlo.error_analysis(name) File "/data2/usr-local/relax-1.2.9/prompt/monte_carlo.py", line 145, in error_analysis self.__relax__.generic.monte_carlo.error_analysis(run=run, prune=prune) File "/data2/usr-local/relax-1.2.9/generic_fns/monte_carlo.py", line 219, in error_analysis Xav = Xsum / float(n) ZeroDivisionError: float division Dr. Hongyan Li Department of Chemistry The University of Hong Kong Pokfulam Road Hong Kong