Sorry I did not provide enough information, I found the solution in another forum HII was having trouble replicating your error. Your provided info is not supplying enough to build a test report with. Offhand if you are using a Multi-value parameter for Consolidate, then that expression won't work, as well as, if your EndPeriod parameter is an integer then you should convert it to a string:=IIF(Parameters!Consolidate.Value = "ALL", "Retail HeadCount Report for Period: "& Parameters!EndPeriod.Value.ToString ,Parameters!Consolidate.Value & " HeadCount Report for Period: "& Parameters!EndPeriod.Value.ToString)If you are using a multi-value parameter for Consolidate then you will have to use the JOIN function:=IIF( Join(Parameters!Consolidate.Value,", ") = "ALL, ", "Retail HeadCount Report for Period: "& Parameters!EndPeriod.Value.ToString , Join(Parameters!Consolidate.Value,", ") & " HeadCount Report for Period: "& Parameters!EndPeriod.Value.ToString)
Thanks for the feedback