I am using CR8.0. Parameter1 is a multiple selection parameter. If the constituent = C or A and the lookup = 1 then show records. Paramter 2 is also a multiple seection paramter. If constituent = I or P and lookup = 2 then show records. In the selection expert, I want to be able use the lookup and have it select records based on either paramter1 or 2. The idea is to do some type of array or if then using the 2 paramters in the selection expert to limit records based on which paramter is selected. I tried it and initially limited some records. However when I used paramter 2, paramter 1 records still showed up. Essentially there should have been some type of reset. Any ideas on what to do here