Circular Reference Error

I am trying to round a number up but I get a circular reference error. I am using =(E67/3.4)+D67 in cell D68. The cell shows 216.705 but I want it to show 217. Cell D67 is =SUM(D2:D66). Cell E67 is +SUM(E2:E66). When I change cell D68 to =(E67/3.4)+D67+ROUNDUP(M66,0) then I get a circular error message. Can you help? Is there an easier way to just round up my number in cell D68? Thanks, jhclaws.......