Hi Shane, It seems not fixed yet. I compared the code and saw that you add "if (Seam)" for onreadystatechange handler. I applied that change and tested it again. The error remain the same. I used firebug to debug into it and set a breakpoint at the code. When executing reach the line, Seam object is still there. See below screenshot: [img]https://www.1place.co.nz/images/img1.jpg[/img] After stepover twice, the Seam object is gone. See below screenshot: [img]https://www.1place.co.nz/images/img1.jpg[/img] View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4077565#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...