We are using both at the moment as they have different packages. Drools has already upgraded to mvel2-2.0.10.jar. -rw-rw-r-- 1 kevin kevin 608039 2009-06-08 14:52 services/jbrules/lib/ext/mvel2-2.0.10.jar The only uses of the mvel1 that I can see are JBpmObjectMapper and ObjectMapper, so smooks should be free to use the same version as drools and ignore mvel1. I'll create a separate task to look at upgrading the mvel1 usage. Kev View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4240910#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...