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 Dr. Hongyan Li Department of Chemistry The University of Hong Kong Pokfulam Road Hong Kong