re-reading the error message, it looks like it uses the right half of the expression to determine the type, and then attempts to convert the left half to that type. (check the source code to confirm.) so I'd still suggest the same plan -- figure out how to make the right side of the equation a double. And please post your eventual solution for others to see who might need to do this eventually. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4032515#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...