Hi, I know this is an older thread but I am having the same issue as the original poster.
I am using Inventor 2013 Design Suite Premium on a Windows 7 64 bit professional O.S.
Inventor crashed on me and when I opened it up and went to change some dimensions on a sketch, the leader lines were there with no arrows and no dimension numbers. I was able to edit the dimension though. Figuring I might of changed the dimension style somehow I went to go into the Application options and got the same message as the OP.
Was there ever a solution to this problem?
Only thing I can think of is doing a repair on the installation. Good luck.
Windows 7 x64 -64 GB Ram, Intel Xeon E5-1620 @ 3.6 GHz
ATI FirePro V7800 2 GB, 180 GB SSD & 1 TB HDD
Inv R2013 PDS SP1.1 Update 2, Vault 2013 Workgroup Update 1