Finally I got my process definition working. Basically I had to apply that fix to Decision.java (thanks for your suggestion) and also change the expression to start with '#{' and end with '}' as shown below. <decision name="decision1"> | <transition name="1" to="end1"> | <condition>#{var1 == '1'}</condition> | </transition> | <transition name="2" to="task2"> | <condition>#{var1 == '2'}</condition> | </transition> | </decision> When debugging the code, I noticed that there was a method to translate expression to dollar (in JbpmExpressionEvaluator.java) which in turn would expect an expression starting with '#{'. So I decided to change my process definition in order to see if that would make a difference at all. Hopefully it did. Thanks for your help, Dário View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4041172#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...