After much reading on ObjectDBX, I followed "The Wonder Llama's" ObjectDBX Example ([URL]http://www.cadvault.com/forums/showthread.php?t=2881[/URL]) and created my app, which work fine on my machine, but when I try and use the application from another machine it fatals autocad. I tracked the problem to AXDB15.TLB being referenced, is this correct ? Because if I reference axdb15.dll I don't get the fatal and all works well.....?? The reason I ask is Quote: Just to be clear - you DON'T reference axdb15.dll you DO reference AXDB15.TLB taken from the link above. Can someone clarify this or give me hint as to why I have this issue ?