Read only dialog box

I have created a menu that will allow me to open one of our standard "read-only" drawings. The only thing that I am having a problem with seems to be the dialog box that pops up once the command has executed and opens the drawing. This have tried this command but cannot get past the dialog box:(command "_open" / "11x17.dwg" / "y") If I run the command as: (command "_open" / "11x17.dwg")I get right to the dialog box. I am extremely new to lisp and I know this is probably something very basic, but for the moment, the answer eludes me. The desired result is to automatically open the read only drawing and not force the end user to have to click the "yes" button. It would be greatly appreciated if someone could point me in the correct direction.Thanks in advance.