Whether they are in the classpath is a choice made by the developer of "your application". Whether they need to be in the classpath is another question, to which I would answer "yes". "Chapter 3. Installation and Setup" of "droolsjbpm-introduction-docs.pdf" in the binaries folder of the download gives more details. With kind regards, Mike On 13 September 2011 17:33, John <jfullard(a)progeny.net&gt; wrote: