Thanks Mike and Jeffrey. I found our that Layout scrapbook should be always parked at any scrapbook other that ConDoc Drawings prior to Exporting even when Layout is closed, so that, when you open layout, ConDoc Drawings scrapbook is not the active one, then you select it and it should be fine. However if you Export and opened Layout and ConDoc Drawings Scrapbook was the active one, then Layout crashes.
So, always make sure that you select another scrapbook other than ConDoc Drawings before closing Layout.