I have a report with a number of tables in it. I want to use a Date parameter I setup in the main report section in the queries of the sub-datasets for the tables. I've tried adding a parameter to the sub-dataset, then adding that parameter to the table, using the parameter in the main report as the default expression, but when I run a preview, it tells me it can't find the parameter in the main report. I've also tried mapping the paramter to the table, but that results in a ClassCastException error. I've attached the report below (it's a pretty basic report, as I'm a beginner at this). The only sub-dataset I've put a parameter in so far is "trial." The parameters are "runDate" in the main report and "runTimeDate" in the sub-dataset. The first table, titled "trial," is the one I've been testing this with. I think the query in the dataset has the reference to runTimeDate still in it. I've changed it a number of times, just trying to get it recognized, let alone run. Thanks for any help!