Selected Quark has no extension, or has an invalid extension
Cause : The file name of the selected file for the QXD File property of the current QxdPages ScriptLine, either has no extension, or has an extension that is not recognizable by QuarkXPress (ie. it is not .QXD for QuarkXPress 3-4-5, or .QXD and .QXP for Quark 6 and above).
This error usually comes from using a Macintosh file directly.
•Select a QXD file : Automatically opens the QXD File property editor.
•Delete Script Line : Deletes the current QxdPages ScriptLine.