Gaja (5/28/2016)
Check if there are any filters on Dataset and report itself.
No filters, just groupings. This doesn't really answer why it takes 10 minutes to "load". There's not many rows of data (maybe 60 at most). If Microsoft Excel can do the maths and produce a graph in the blink of an eye, what is causing SSRS to take so long? Considering it's running on SQL Server back end, something seems "wrong", as I know our SQL Server has far more processing power than my desktop.
Thom~
Excuse my typos and sometimes awful grammar. My fingers work faster than my brain does.
Larnu.uk