I have a DWG file that I'd like to edit but for some reason I cannot select anything within the file, except for the title block. I do a little bit with DWG files and haven't come across this with other files until now and I now have a complete set of drawings that all behave the same way. Its as though the DWG creator has locked the main content for editing. I'm not sure of which CAD software was used. But I would like ot believe that someone supplying DWG files would not be stupid enough to think that locking them would be acceptable. Any ideas? Thanks in advance for any advice.