Hi Friends,

I had a same problem with My MAC book. It was crushing whenever I am attempting to open any files it will popup the window Fatal error.WHIP failed to initialize.

Thanks a lot Maxim !! My problem has resolved by using the following trick : 

Launch AutoCAD from Dock by holding Shift key on keyboard and clicking on AutoCAD icon (you need to hold Shift for at least a few moments after you click on icon) and Double click on the AutoCAD icon without left shift key. With this process your AutoCAD reset all your existing setting as default setting.

No need to remove Autocad and reinstallation task. Thanks !!!

Best Regards,

Hemant.