Could the relations be relative to another file?
no, this is a part file not assembly. the lines loss their referernces as they are opened in a newer version of solid works(2011)
The bad news is that sometimes stuff like this happens when you move between versions, although usually on trickier features. The good news is that the two relations you have shown (coradial and tangent) can be easily repaired. You're out of luck if a converted edge goes dangling.
Oops, I forgot to say that, if you are a very nice person, you will send this into your VAR so that SW can see that the 2011 code has a problem tracking 2009 files. Since this is pretty basic stuff, there is a pretty good chance that they will fix it.
Message was edited by: Jerry Steiger