We are using Autocad 2012 and 2012LT in our office and with this version started using the built in feature of DWG to PDF. One issue we have come across is, if we create a pdf file and then need to recreate the same file we can not overwrite the existing file. We are forced to either give the new file a different name or go back and delete the existing file prior to creating the new one. Has anybody else run into this problem? Got any ideas how to solve it?
This sounds more like a file security or file permissions problem than anything related to AutoCAD or the PDF driver. Plotting to PDF from within AutoCAD should allow you to overwrite. A test might be to see if the same thing happens to the same user when printing to PDF from other programs such as Word, Excel, Acrobat, etc.
Check an existing PDF drawing in a directory that's been giving you problems and see if it is Read-only. If so you may have to make user permission changes.
This has been working for several years using Adobe Acrobat as our PDF creation tool. The security settings have not changed for several years either. The users that are still using Autocad 2009 and Adobe Acrobat do not have this issue. It is just with those users which I have upgraded to Autocad 2012 and the built in PDF feature. I have not tried going back to using Adobe Acrobat yet but I would prefer not to do that.
So the users are having problems saving files to directories on a file server system then. Do they still have problems if they plot to PDF on their local machine? In other words, does the overwrite denial still happen locally, or just when saving to a directory on the server?