Thanks, I see the issue with how I treated criteria. I made a new field with IsValid: IIf(DateDiff("d",Date(),DateAdd("d",[Task_List].[Interval],[Task_Log].[Date1]))<0.1*[Task_List].[Interval],1,0) and set criteria to 1. Does what I wanted it to.
Still, my original issue stands when I tried to...