hi, I want to link back to a main report where I can see the entered parameter-values (they are not lost after going back) and also the parameter panel expanded. I used this expression to do it: ="javascript:void(window.location='../../ReportSvr/myReport.rdl') How can I add my Parameters like "p_User" or "p_Year" to the expression?

check this thread, hopefull you will find out some information. http://social.msdn.microsoft.com/Forums/en-US/sqlreportingservices/thread/8bf1f386-0c9a-46ba-8af1-7ecc4c13be36 mark it as answer if it answered your question :)

this expression helps in my case: ="javascript:history.back()"