Pass The Parameters From Main Report To Drillthrough Report

Good morning, all

I have a really cool Budget report which has two matrices on it. One is used/visible if the user selects four levels of grouping, and one is used if the user selects only three levels of grouping. The four choices for grouping are four fields, Par, FERC, Point, and Resource.

Since grouping is optional, I need a way to pass the parameter for a field that is not grouped on from the main report to the drillthrough report. For example if the user chooses to group on all fields but Point, I need to pass the report parameter that was used by the main report for Point to the drillthrough report as a report parameter.

So, I tried testing the three grouping levels values and if none were equal to "Point" then pass in the parameter by putting the following expression in the Parameter Value box for the Point parameter on the Navigation tab of the datacell of the main report that is the drillthrough link:


=iif(
Parameters!GroupLevel1.Value <> "Point"
and
Parameters!GroupLevel2.Value<>"Point"
and
Parameters!GroupLevel3.Value<>"Point"
,
Join(Parameters!PNTPoint.Value,",")
,
Fields!Point.UniqueName
)

But this is not working; the drillthrough report shows a blank dropdown for the Point parameter and I have to manually set it. Does anyone see an error in the syntax of the iif statement?

Any references, links, resources or good clean jokes would be greatly appreciated.

Thanks,
Kathryn