Cascading multi-value parameters violate CONSTRAINED flag when filtering parameter list

Question

In our cube, we have hierarchies with All as the default member at the top level, so All then shows up in the parameter list in a SSRS report.

Since it is redundant to have both All and (select all) in the parameter list when the parameter is a multi-value parameter, we want to get rid of the option to see All in the parameter list. This we've accomplished by setting a filter in the auto-generated dataset for the parameter (ParameterLevel <> 0).

The trouble starts when we introduced cascading parameters.... it seems like when a user selects all of the parameters in the top parameter, the next parameter tries to default to All and so hitting the CONSTRAINED error:

The restrictions imposed by the CONSTRAINED flag in the STRTOSET function were violated.

Any ideas on how to get around this problem?

Answer 1

It turns out it wasn't because of the second parameter defaulting to All... the error seems to show up when Unknown (auto-generated by BIDS) was selected. Not sure why this is causing the STRTOSET error though...