I found the cdeconvert app, got a clean build and then the error about not passing the file path. Sorry for the lame question, but I have never built/run an OS X app from XCode directly. Question is: how do I execute (either from XCode or OS X directly) cdeconvert passing the cdeevent file path?
cdeconvert is a command line tool. Once it is built, you can locate the executable file (in Products), and use it via the command line. There is no app.