Hey there, I really need some help on this. I'm extremely stuck. I'm attempting to use the MongoDB java driver (not bukkit or minecraft related) to gain access to my database. Everything works fine when I create a new (regular) java project, add the mongo java driver to my build path, and then compile it with small tests. But, when I add the mongo java driver .jar file to my Bukkit project, I have the ability to import the required files from the java driver (EX: com.mongodb.MongoClient), and there are no errors. But when I compile and then start up my server, I get errors like NoClassDefFound and NoClassFoundException: com.mongodb.MongoClient. TL;DR I have a non-bukkit/minecraft related library that I added to my build path correctly, but can't be found when I compile and run my server. Bump EDIT by Moderator: merged posts, please use the edit button instead of double posting.