by erik » 02 Nov 2012, 11:46
A similar issue was reported a few months ago on Stackoverflow (http://stackoverflow.com/questions/10873259/edmessage-framework-error). At the time I thought it was a one-off because I couldn't reproduce it. If this comes up more often we should investigate.
I have just redownloaded the published binary for EDCommon (http://www.mulle-kybernetik.com/software/EDFrameworks/), created a new project, and used some EDCommon functionality in it. All worked fine, no linker errors. (You have to turn ARC off, there's a class in EDCommon that's incompatible with ARC.) This was in Xcode Version 4.5.1 (4G1004) on OS X 10.8.2.
Could you provide more detail? What version of Xcode are you using? How did you download EDCommon, how did you include it in the project? What architectures are you building for?