Hello,

I have another trouble:
I've got a dataset with a multivalue parameter that I want to be optionnal, but it seems that the "allow blank value" option doesn't work cause when i try to deselect everything and then click out of the drop down list, it selects one checkbox again...
Anyone has an idea of how to do this

thanks
nico

My own reply: "allow blank value" doesn't act on the number of items you can select in a parameter. It is simply not possible to have one single parameter both multivalue and optionnal. The idea is to have one first parameter saying whether the second is to be taken into account (multi-value used as usual) or not (whatever the selection, taken as "nothing selected")