AutoCAD Land Desktop

[#1]

This morning when I started my Land Desktop 2009 I received the error that my prototype paths did not exist and to go to user preferences to set them.  When I went to user preferences the types are not there anymore and I can't save any path.  I did not have any issues the day before so I can't figure out what happened.  Does anyone have an idea on how to fix this besides re-installing the program?  I can currently still use AutoCAD but I do not have any access to anything LDD.

[#2]

Where you adjusting anything in your SDSK.dfm file per chance?  If you did, did you create a copy first of the file?  If you were and hopefully you did then restore the original and see it clears the program.   You could also copy this file from another computer in your office if they are running the same software.  Do you back up your system?  Check for the file there too if you do.  If not, then do a repair thru the Control Panel > Add/remove programs.