[idvusers] Aggregate grids by time bug

Does anybody know if the issue with intermittent nature of "Aggregate grids
by time" has been solved? I got it to work once in about 20 attempts. I
know it's been an issue in the past.
Is there some other method available?

Alan Bol
Project Lead | Scientist | Instructional Design
303.497.8334 voice
303.497.8491 fax