Hello Steve, I've made some tests with the 1.7.1 release of Jackson library in conjunction with the current trunk of the Restlet framework and it works well for me. I notice also that in both current trunk and 2.0 branch of Restlet, this line of code (pointed by the exception message) "org.restlet.ext.jackson.JacksonRepresentation.createObjectMapper(JacksonRepresentation.java:119)" is the same and that, referring to the Jackson javadocs, the signature of the "JsonFactory#configure" method is the same in both 1.4.3 and 1.7.1 release of Jackson.
I wonder, what release of Restlet are you using? Best regards, Thierry Boileau ------------------------------------------------------ http://restlet.tigris.org/ds/viewMessage.do?dsForumId=4447&dsMessageId=2699272