Hi Claus, Firstly, thank for your answer.
I currently use Maven to manage dependencies, and I do not specify different versions of Apache Camel nor in the POM nor in the dependency tree. As you suggested it, I double checked it again. But, because human beings are fallible, I link you the maven dependencies and the related dependencies tree in case there exist some not obvious ignored requirements such as activemq version must be 5.10.0 with camel 2.14.0. I hope this help you to state whether or not the error is due to a version conflict. For now, I don't see any version conflict. Here is the dependencies of my project (I provide links to avoid a very long post on the mailing list) pom.xml that specify dependencies : http://arthurvaisse.free.fr/work/pom.xml text file containing the dependency tree : http://arthurvaisse.free.fr/work/dependencies_tree.txt Vaisse-Lesteven Arthur -- View this message in context: http://camel.465427.n5.nabble.com/Problem-with-REST-DSL-2-14-0-and-String-bean-tp5758812p5758965.html Sent from the Camel - Users mailing list archive at Nabble.com.