AutoCAD 2007 - Windows XP
I am getting this dialog box when opening up one of the project files. this file is 1 of 300+ files and is the only one giving me this dialog. Any idea what is causing this? It happens on any machine we try it with. It happens with the drawing saved as 2004 or 2007. AutoCAD 2006 will display the "Drawing file is not valid." dialog box.
We do use Revit Structure in house but this project is no where near Revit and the people working on it do not have Revit on their machine.
Any ideas??
thanks,
jamie