Hi Traci,
I just tried your proposed solution and it worked for me. I’ve enclosed a screenshot of the formula editor so you can compare. The quotes are very tricky as I’m sure you know. The attribute names require back-tic quotes so that the hyphen is not interpreted as a minus sign. And I would suggest that you use an empty string with no space as the empty value.
It’s disturbing that you were able to crash CODAP. Can you email me a document that does that so we can track down the problem?
Thanks, Bill
