I have repeated this several time in a row.
My proceedure was as follows.
I create a blank Coreldraw X7 document. I then import a .jpg bitmap file into that document.
I select Trace Bitmap>Outline Trace>High Quality Image.
I get a window stating "Bitmap size is to large to trace and must be reduced." (I can't find info on the maximum import image size anywhere.) The popup window gives the options to "Reduce Bitmap" or "Cancel." If I choose cancel, the program crashes every time.
I did select Reduce Bitmap and the program did not crash.
This is a Windows 7 64 machine.
With my example, clicking on cancel did not crash the program, but it caused a window switch to another program, with the popup window still on screen, which is very weird and does imply something wrong happening behind the scenes.
I then had to click cancel a second time for it to actually cancel the trace attempt.