Ah, you're right, I looked right past it. I don't get a generation error, but looking at the code issuing the message it's when it tries to set the data for the file. Eclipse is throwing an error but we're not providing the original message, just a more user-friendly message. I'll update our code to print the stack trace to the log when this happens.
Are you using the nightly builds or are you on an official release? And what is your workspace default encoding (Window > Preferences > General > Workspace, bottom section labeled 'Text file encoding').
Also, does the file HitlistTitleInfo.eglsmap exist already? It would be in the same folder as HitlistTitleInfo.java. You will need to check in the Navigator view, since Project Explorer hides the *.eglsmap files by default.