After a lot of debugging I found the reason, why the GL context is missing. I compared the working case (open document using menu "Open") with the non-working case (open document using menu "Recent files..."). The difference between the two cases is that in the working case the function CustomGLWidg...

Just looked at the documentation of QOpenGLWidget::isValid() and found an interesting note: bool QOpenGLWidget::isValid() const Returns true if the widget and OpenGL resources, like the context, have been successfully initialized. Note that the return value is always false until the widget is shown....

I compiled FC in debug configuration and started it in a debugger. Now it stops at an assertion point in QuarterWidget.cpp:889: frame #4: 0x0000000100a65b25 libFreeCADGui.dylib`SIM::Coin3D::Quarter::QuarterWidget::paintEvent(this=0x0000000108bd7c00, event=0x00007ffeefbeae90) at QuarterWidget.cpp:889...

See here https://forum.freecadweb.org/viewtopic.php?f=3&t=39845 Can you please elaborate what the link should tell us? The link refers to the issue mentioned in the previous post: There's another little bug, also with macOS 10.14: Freecad unexpectedly quits when I try to open a file from the "recen...

See here https://forum.freecadweb.org/viewtopic.php?f=3&t=39845

Cant confirm here also So it is indeed time to reset the configuration with the button in the preferences. Another possibility is to delete your config files or to move them in case you want to restore them. As I already wrote in my previous mail from 6:10 PM it is indeed configuration related. So,...

This is what I have guessed too but the only problem is that strncpy doesn't occur inside c_glglue_instance. It's used inside the function glglue_set_glVersion() which is invoked from within c_glglue_instance but then in the call stack glglue_set_glVersion() should occur, too. I guess that glglue_s...

OK, I tried it on another Mac: OS: macOS High Sierra (10.13) Word size of OS: 64-bit Word size of FreeCAD: 64-bit Version: 0.19.18403 (Git) Build type: Release Branch: master Hash: 0717b4fc23ef1db70964c3977d25e2fe46a739d1 Python version: 3.7.3 Qt version: 5.12.5 Coin version: 4.0.0a OCC version: 7.3...

1 libCoin.80.dylib 0x0000000110c0b759 cc_glglue_instance + 521 Does anybody know what exactly the 521 means? It is the offset relative to the symbol cc_glglue_instance, where the next function (strncpy) is called from, i.e. the call to strncpy() is located 521 bytes after the entry point of cc_glgl...

Nobody can confirm the crash?