Activity has units stored in November 2015 of -70000 (but no value in the cost) but is finshed in December 2015 then in the September of 2016 the same activity has units of +70000 (but no cost).
if i try to zero the period it just causes the units to go up/down by whatever i put the costs up/down as.
do i need to unfinish the activity change it then finish it?
i dont know how the activity has units but no cost.
using primavera p6
J K that should work are you using store period performance ?