We recently has an interesting scenario when starting AutoCAD 2013 on a Mac, the splash screen would start then suddenly disappear. In the console, the following error message would be displayed:
12-05-18 9:36:46.904 AM [0x0-0x92092].com.autodesk.AutoCAD_LT_2013: set SkipExisting to true
It appeared to be a symtom of a corrupted productinformation.pit or a adskflex_*_ .data file but it was NOT the case.
FYI, the productinformation.pit file on the Mac is located here:
cd "/Library/Application Support/Autodesk/ADLM/.config/"
cd /Library/Application\ Support/Autodesk/ADLM/.config/
The adskflex_*_ .data file on the Mac is located here:
cd "/Library/Preferences/FLEXnet Publisher/FLEXnet"
cd /Library/Preferences/FLEXnet\ Publisher/FLEXnet
The solution was quite interesting, in this case, if you are using Apple's Screen Sharing [Version 1.3.2 on Mac OS X 10.7 Lion] feature, you will need to make sure that a monitor is connected to the computer before launching the software. This made me think of the good old days of headless SGI computers. SGI computers back then would not startup if you didn't have a mouse or keyboard connected to them*.
Thanks to James Litwin for sharing this tip with the community.