When I did it (November last year) I just commented out the PBF references because I knew I wasn't going to be using PBF format files at any stage (this may not work for you of course). I vaguely recollect form this list that later mkgmap versions handle the lack of PBF libraries better if they're not available (but may be completely misremembering that - best to check the list archives). I'm guessing that you've found and had a read of stuff like http://github.com/scrosby/OSM-binary , http://code.google.com/p/protobuf/ , http://wiki.openstreetmap.org/wiki/PBF_Format aleady? Other possible gotchas: o I set the compiler level to 1.6 (the default may not be 1.6 if you've primarily used Eclipse for something else). o I had to install ant (it wasn't part of the "general Java" eclipse that I'd been using). I doubt that either of these are relevant if you've been using Eclipse for ages, but just in case... Cheers, Andy