we have some 64 bit machines (windows xp 64 bit edition running on 2x Quad core zeon CPUs). I have found that if accessing a website that has cgm content using isoview as a viewer, if the site uses a frame or iframe to show the drawing a blank screen is displayed. But if mime type or clsid are include in the webpage code (via embed or object tags) the drawing is displayed. example code: <embed type="application/x-isoview" src="abc.cgm" border="1" width="400" height="300" view="Start"/> <object id="ivx" classid="clsid:865B2280-2B71-11D1-BC01-006097AC382A" src="abc.cgm"> </object> is there a known fix or workaround for this issue we are using isoview 5. thank you for your time.