*** Break *** segmentation violation =========================================================== There was a crash. This is the entire stack trace of all threads: =========================================================== gdb.printing.register_pretty_printer(gdb.current_objfile(), gdb.printing.register_pretty_printer(gdb.current_objfile(), Thread 2 (Thread 0x7fe360976700 (LWP 29956)): #0 0x00007fe37bd33b3b in do_futex_wait.constprop.1 () at /lib64/libpthread.so.0 #1 0x00007fe37bd33bcf in __new_sem_wait_slow.constprop.0 () at /lib64/libpthread.so.0 #2 0x00007fe37bd33c6b in sem_wait GLIBC_2.2.5 () at /lib64/libpthread.so.0 #3 0x00007fe37c053d55 in PyThread_acquire_lock () at /lib64/libpython2.7.so.1.0 #4 0x00007fe37c01f8a6 in PyEval_RestoreThread () at /lib64/libpython2.7.so.1.0 #5 0x00007fe3640d8076 in time_sleep () at /usr/lib64/python2.7/lib-dynload/timemodule.so #6 0x00007fe37c027300 in PyEval_EvalFrameEx () at /lib64/libpython2.7.so.1.0 #7 0x00007fe37c02964d in PyEval_EvalCodeEx () at /lib64/libpython2.7.so.1.0 #8 0x00007fe37bfb307d in function_call () at /lib64/libpython2.7.so.1.0 #9 0x00007fe37bf8e073 in PyObject_Call () at /lib64/libpython2.7.so.1.0 #10 0x00007fe37c021d0d in PyEval_EvalFrameEx () at /lib64/libpython2.7.so.1.0 #11 0x00007fe37c026ccd in PyEval_EvalFrameEx () at /lib64/libpython2.7.so.1.0 #12 0x00007fe37c026ccd in PyEval_EvalFrameEx () at /lib64/libpython2.7.so.1.0 #13 0x00007fe37c02964d in PyEval_EvalCodeEx () at /lib64/libpython2.7.so.1.0 #14 0x00007fe37bfb2f88 in function_call () at /lib64/libpython2.7.so.1.0 #15 0x00007fe37bf8e073 in PyObject_Call () at /lib64/libpython2.7.so.1.0 #16 0x00007fe37bf9d065 in instancemethod_call () at /lib64/libpython2.7.so.1.0 #17 0x00007fe37bf8e073 in PyObject_Call () at /lib64/libpython2.7.so.1.0 #18 0x00007fe37c01ff07 in PyEval_CallObjectWithKeywords () at /lib64/libpython2.7.so.1.0 #19 0x00007fe37c057e42 in t_bootstrap () at /lib64/libpython2.7.so.1.0 #20 0x00007fe37bd2dea5 in start_thread () at /lib64/libpthread.so.0 #21 0x00007fe37b34db0d in clone () at /lib64/libc.so.6 Thread 1 (Thread 0x7fe37c4f7740 (LWP 29931)): #0 0x00007fe37b314659 in waitpid () at /lib64/libc.so.6 #1 0x00007fe37b291f62 in do_system () at /lib64/libc.so.6 #2 0x00007fe37b292311 in system () at /lib64/libc.so.6 #3 0x00007fe373fda3fc in TUnixSystem::StackTrace() () at /usr/lib64/root/libCore.so #4 0x00007fe37192e5ef in (anonymous namespace)::TExceptionHandlerImp::HandleException(int) () at /usr/lib64/root/libcppyy_backend2_7.so.6.24 #5 0x00007fe373fdc24b in TUnixSystem::DispatchSignals(ESignals) () at /usr/lib64/root/libCore.so #6 0x00007fe37bd35630 in () at /lib64/libpthread.so.0 #7 0x00007fe35ba257ce in RooAbsArg* (anonymous namespace)::findUsingNamePointer > >(std::vector > const&, TNamed const*) () at /usr/lib64/root/libRooFitCore.so.6.24.08 #8 0x00007fe35ba2b6fe in RooAbsCollection::selectCommon(RooAbsCollection const&) const () at /usr/lib64/root/libRooFitCore.so.6.24.08 #9 0x00007fe35ba70b77 in RooAbsReal::plotOn(RooPlot*, RooAbsReal::PlotOpt) const () at /usr/lib64/root/libRooFitCore.so.6.24.08 #10 0x00007fe35ba76ab6 in RooAbsReal::plotOn(RooPlot*, RooLinkedList&) const () at /usr/lib64/root/libRooFitCore.so.6.24.08 #11 0x00007fe35ba536f9 in RooAbsPdf::plotOn(RooPlot*, RooLinkedList&) const () at /usr/lib64/root/libRooFitCore.so.6.24.08 #12 0x00007fe35bbe0178 in RooSimultaneous::plotOn(RooPlot*, RooLinkedList&) const () at /usr/lib64/root/libRooFitCore.so.6.24.08 #13 0x00007fe35ba6ba93 in RooAbsReal::plotOn(RooPlot*, RooCmdArg const&, RooCmdArg const&, RooCmdArg const&, RooCmdArg const&, RooCmdArg const&, RooCmdArg const&, RooCmdArg const&, RooCmdArg const&, RooCmdArg const&, RooCmdArg const&) const () at /usr/lib64/root/libRooFitCore.so.6.24.08 #14 0x00007fe34140846f in () #15 0x00000001210c50c0 in () #16 0x00000001214436a0 in () #17 0x000000012156f550 in () #18 0x00007ffe544c05f0 in () #19 0x00007ffe544c04e8 in () #20 0x00007ffe544c03e0 in () #21 0x00007ffe00000000 in () #22 0x0000000121123068 in () #23 0x0000000003cd3b30 in () #24 0x0000000014a4b520 in () #25 0x0000000800000000 in () #26 0x000000026e82ce00 in () #27 0x0000000000000000 in () =========================================================== The lines below might hint at the cause of the crash. You may get help by asking at the ROOT forum https://root.cern.ch/forum Only if you are really convinced it is a bug in ROOT then please submit a report at https://root.cern.ch/bugs Please post the ENTIRE stack trace from above as an attachment in addition to anything else that might help us fixing this issue. =========================================================== #7 0x00007fe35ba257ce in RooAbsArg* (anonymous namespace)::findUsingNamePointer > >(std::vector > const&, TNamed const*) () at /usr/lib64/root/libRooFitCore.so.6.24.08 #8 0x00007fe35ba2b6fe in RooAbsCollection::selectCommon(RooAbsCollection const&) const () at /usr/lib64/root/libRooFitCore.so.6.24.08 #9 0x00007fe35ba70b77 in RooAbsReal::plotOn(RooPlot*, RooAbsReal::PlotOpt) const () at /usr/lib64/root/libRooFitCore.so.6.24.08 #10 0x00007fe35ba76ab6 in RooAbsReal::plotOn(RooPlot*, RooLinkedList&) const () at /usr/lib64/root/libRooFitCore.so.6.24.08 #11 0x00007fe35ba536f9 in RooAbsPdf::plotOn(RooPlot*, RooLinkedList&) const () at /usr/lib64/root/libRooFitCore.so.6.24.08 #12 0x00007fe35bbe0178 in RooSimultaneous::plotOn(RooPlot*, RooLinkedList&) const () at /usr/lib64/root/libRooFitCore.so.6.24.08 #13 0x00007fe35ba6ba93 in RooAbsReal::plotOn(RooPlot*, RooCmdArg const&, RooCmdArg const&, RooCmdArg const&, RooCmdArg const&, RooCmdArg const&, RooCmdArg const&, RooCmdArg const&, RooCmdArg const&, RooCmdArg const&, RooCmdArg const&) const () at /usr/lib64/root/libRooFitCore.so.6.24.08 #14 0x00007fe34140846f in () #15 0x00000001210c50c0 in () #16 0x00000001214436a0 in () #17 0x000000012156f550 in () #18 0x00007ffe544c05f0 in () #19 0x00007ffe544c04e8 in () #20 0x00007ffe544c03e0 in () #21 0x00007ffe00000000 in () #22 0x0000000121123068 in () #23 0x0000000003cd3b30 in () #24 0x0000000014a4b520 in () #25 0x0000000800000000 in () #26 0x000000026e82ce00 in () #27 0x0000000000000000 in () =========================================================== Traceback (most recent call last): File "simultaneous_v6.py", line 1169, in total_fit(tree_cut, args.outputfile, branches, cuts_q2, signal_parameters,pimumu_parameters,KstarK_parameters,KstarPi_parameters,Leakage_parameters, mean_q2, relative_error_ae_Kstar_over_K, relative_ae_Kstar_over_K, relative_ae_mumupi_over_K, relative_error_ae_mumupi_over_K, relative_ae_Kstarpi_over_KstarK,str(args.mva),args.unblind) File "simultaneous_v6.py", line 747, in total_fit simPdf.plotOn(xframe,RooFit.Slice(sample,"sample_q1"),RooFit.ProjWData(ROOT.RooArgSet(sample),data_comb),RooFit.Components("pimumu_dscb_q1"),RooFit.LineStyle(2),RooFit.LineColor(6),RooFit.Name("pimumu1"),RooFit.LineWidth(3)); TypeError: none of the 4 overloaded methods succeeded. Full details: RooPlot* RooSimultaneous::plotOn(RooPlot* frame, const RooCmdArg& arg1, const RooCmdArg& arg2 = RooCmdArg(), const RooCmdArg& arg3 = RooCmdArg(), const RooCmdArg& arg4 = RooCmdArg(), const RooCmdArg& arg5 = RooCmdArg(), const RooCmdArg& arg6 = RooCmdArg(), const RooCmdArg& arg7 = RooCmdArg(), const RooCmdArg& arg8 = RooCmdArg(), const RooCmdArg& arg9 = RooCmdArg(), const RooCmdArg& arg10 = RooCmdArg()) => SegmentationViolation: segfault in C++; program state was reset RooPlot* RooSimultaneous::plotOn(RooPlot* frame, RooLinkedList& cmdList) => TypeError: takes at most 2 arguments (8 given) RooPlot* RooSimultaneous::plotOn(RooPlot* frame, RooAbsReal::PlotOpt o) => TypeError: takes at most 2 arguments (8 given) RooPlot* RooSimultaneous::plotOn(RooPlot* frame, const char* drawOptions, double scaleFactor = 1., RooAbsReal::ScaleType stype = Relative, const RooAbsData* projData = 0, const RooArgSet* projSet = 0, double precision = 0.001, bool shiftToZero = kFALSE, const RooArgSet* projDataSet = 0, double rangeLo = 0, double rangeHi = 0, RooCurve::WingMode wmode = RooCurve::Extended) => TypeError: could not convert argument 2 (expected string or Unicode object, RooCmdArg found)