Fatal Error: Unhandled AVR 0xd850c7b0 Exception at e8921d09h

[nuwul]

Hi. Have installed AutoCAD 2015 and already activate it (manage to activate it by asking the activation code online since got prblem when activate it). At first all went ok. suddenly this error pop up when some drawings are still opening. FYI, only open 2D dwg with xref & blocks. fortunately, still manage to save drawings. however, i still want to know why this happen & how to solve it.

here is the error message.

Thanks