Hi all, I recently started tinkering with the animation examples in the cookbook and permanently run into segmentation fault 11 errors when passing offscreen to any of the example scripts. It appears to be somehow similar to an issue raised about two years ago (http://main-discussion-list-for-the-graph-tool-project.982480.n3.nabble.com/...). However, I cannot find a solution and would be extremely greatful for any hints to a solution for this error. Might it be related to me using python 3.6 instead of 2.7? For the sake of example I used the animation_dancing.py script (and just changed python to python3). I use: graph_tool: 2.23dev boost: 1.63 gcc: 4.2.1 openmp: True When calling ./animation_dancing.py offscreen the script causes a segfault. Apparently when calling show_all at line: 108 win.show_all() Thanks in advance for any help! Best, marcus P.S. The back trace of the error and the show_config information of graph_tool: lldb back trace: * thread #1: tid = 0x26ef9, 0x00007fff91beb0e9 libobjc.A.dylib`objc_msgSend + 41, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=EXC_I386_GPFLT) * frame #0: 0x00007fff91beb0e9 libobjc.A.dylib`objc_msgSend + 41 frame #1: 0x000000011b45ab16 libgtk-3.0.dylib`register_types + 30 frame #2: 0x00000001168943f6 libgobject-2.0.0.dylib`g_closure_invoke + 262 frame #3: 0x00000001168a93cf libgobject-2.0.0.dylib`signal_emit_unlocked_R + 1783 frame #4: 0x00000001168aa022 libgobject-2.0.0.dylib`g_signal_emit_valist + 1876 frame #5: 0x00000001168aa6f2 libgobject-2.0.0.dylib`g_signal_emit + 134 frame #6: 0x000000011b4368a1 libgtk-3.0.dylib`gtk_widget_realize + 292 frame #7: 0x000000011b4366f7 libgtk-3.0.dylib`gtk_widget_map + 95 frame #8: 0x000000011b33c952 libgtk-3.0.dylib`gtk_offscreen_window_show + 59 frame #9: 0x00000001168943f6 libgobject-2.0.0.dylib`g_closure_invoke + 262 frame #10: 0x00000001168a91bd libgobject-2.0.0.dylib`signal_emit_unlocked_R + 1253 frame #11: 0x00000001168aa022 libgobject-2.0.0.dylib`g_signal_emit_valist + 1876 frame #12: 0x00000001168aa6f2 libgobject-2.0.0.dylib`g_signal_emit + 134 frame #13: 0x000000011b4361f2 libgtk-3.0.dylib`gtk_widget_show + 152 frame #14: 0x00000001169d692c libffi.6.dylib`ffi_call_unix64 + 76 frame #15: 0x00000001169d6289 libffi.6.dylib`ffi_call + 877 frame #16: 0x000000011682b40a _gi.cpython-36m-darwin.so`pygi_invoke_c_callable + 1842 frame #17: 0x000000011682c170 _gi.cpython-36m-darwin.so`pygi_function_cache_invoke + 53 frame #18: 0x000000011682393d _gi.cpython-36m-darwin.so`_callable_info_call + 142 frame #19: 0x000000010000ece6 Python`_PyObject_FastCallDict + 163 frame #20: 0x00000001000b45ee Python`call_function + 194 frame #21: 0x00000001000b1be6 Python`_PyEval_EvalFrameDefault + 26611 frame #22: 0x00000001000b4ea4 Python`_PyEval_EvalCodeWithName + 1798 frame #23: 0x00000001000ab34a Python`PyEval_EvalCode + 100 frame #24: 0x00000001000d435d Python`run_mod + 58 frame #25: 0x00000001000d4634 Python`PyRun_FileExFlags + 178 frame #26: 0x00000001000d3c92 Python`PyRun_SimpleFileExFlags + 469 frame #27: 0x00000001000e7eb6 Python`Py_Main + 3482 frame #28: 0x0000000100001e01 Python`___lldb_unnamed_function1$$Python + 234 frame #29: 0x00007fff9185a5c9 libdyld.dylib`start + 1 frame #30: 0x00007fff9185a5c9 libdyld.dylib`start + 1 graph_tool.show_config() version: 2.23dev (commit eb99e19a, Sun Mar 12 14:31:47 2017 +0000) gcc version: 4.2.1 compilation flags: -DNDEBUG -I/usr/local/opt/llvm/include -fopenmp -O3 -fvisibility=default -fvisibility-inlines-hidden -Wno-deprecated -Wall -Wextra -ftemplate-backtrace-limit=0 -L/usr/local/opt/llvm/lib -Wl,-rpath,/usr/local/opt/llvm/lib install prefix: /usr/local python dir: /usr/local/Cellar/python3/3.6.0_1/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages graph filtering: True openmp: True uname: Darwin XXXXXX.local 14.5.0 Darwin Kernel Version 14.5.0: Tue Apr 11 16:12:42 PDT 2017; root:xnu-2782.50.9.2.3~1/RELEASE_X86_64 x86_64 -- View this message in context: http://main-discussion-list-for-the-graph-tool-project.982480.n3.nabble.com/... Sent from the Main discussion list for the graph-tool project mailing list archive at Nabble.com.