No, this error appear on 2 tree (gwt ext) and a Grid with a potential big set of data... But an other grid in an others part of my application, with an other big set of data work ... I use cross-site compilation (xs linker) ... Thanks for reply -- You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. To post to this group, send email to google-web-tool...@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.