Passing rendering format and report parameters in the URL to call a report - SSRS 2012

Hi,

I've a SSRS 2012 with the integer and multivalue Creation_Years parameter that I need to call directly to export data in the Excel format.

I've tried to use this URL: http://reportserv/Reports/Pages/Report.aspx?ItemPath=%2fInsurance%2fInstallations_Excel&rs:Format=excel&Creation_Years=2014 but the parameter is required in an interactive manner.

I've tried to set the hidden property for the parameter, I've tried to invert the position of the "rs:Format=excel" string with the "Creation_Years=2014", but the error message doesn't change. Also if I specify the 2015 year, the parameter isn't overwritten with the 2015 value.

Any helps to me, please? Thanks