When trying to use the following function I get an automation error if someone is using the file being referenced. Can I reformat this to open the file read only or something? (setq dbxdoc (vla-GetInterfaceObject *acad* ObjectDBX.AxDbDocument.16")) (vla-open dbxdoc filename) I did try using (vla-open dbxdoc filename :vlax-true) but I still get the Automation error... thanks again! kemp