We have multiple users that can open the same .dwg file with out getting a "read only" error. This does not happen every time, or to the same user all the time. It also happens across all4 2008 CAD we run. AutoCAD, MEP,ADT, and C3D. The network tech is sure is is AutoDesk, and the CAD expert is sure it is the network. Since this happens not only on the WAN, but the LAN also it would appear to be software related.
The first user to open will create the .dwl adn .dwl2, and the second user will still be able to open the file.
All the worktatiosn are Windows XP SP2, and the file server is Windows Server 2003 Standard SP2, running as file server only. No extra AD or DC items.
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