That's not an error, but a warning.
When EA opens your project it will ask the svn client to do a getlatest.
This warning means your svn client isn't able to do a getlatest within 30 seconds.
That could be due to an internet connection error, or due to the fact that the svn server has to wake up, or ...
In most cases I've seen allowing more time solves the problem.
If you want to avoid this in the future you could do a getlatest from TortoiseSVN before you open your project in EA.
Geert
PS. I'm guessing you mean that you have packages in your model that are controlled in SVN, not that you have the actual .eapx file in SVN.