Thanks for your help thus far, Rob. I have created the Custom Users List and module as you advised. As such, my Users list and Custom Users List are identical. The only difference is that the Custom Users List has a top-level item "All Users". I am still having trouble pulling those inputs from the real user module into this custom users module, and a lookup doesn't seem to be cutting it. At this point it is too late to switch the dimension over from Users to Custom Users in that module where these users were inputting data. Attached are some screenshots to help illuminate this: 1) Original Users dimensioned module. The line items at the bottom are the ones we want to be able to aggregate. 2) Error message, Custom Users dimensioned module, and a look at the formula. You can see that I am trying to use "Customer User Identifier", which should be identical for the Users and Custom Users, as a way to bridge the gap. Where do I need to go from here? Thanks, Robin
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