Thanks for the quick repsonse.
I alerady mentioned in the first post that the sub report runs fine on its own, the field one the subreport returns values.
Im new to BIDS so Im not sure where I am doing something wrong
the parameters on the main report are year, period and bank
So when I right click on subreport and properties, i go to the parameters and put the belowName Value
Is that correct? I've also tried with the brackets but makes no difference.