Unable to manually update of status for a task if there are ETCs greater than 0 and Assignments are not Completed in Clarity PPMSteps to Reproduce:
Release: Component: PPMPRM
This is working as designed. The task cannot be marked completed if there are still any ETCs remaining. Change the ETC 0 then the task status should be able to be changed to Completed.If the above doesn't help see KB000030141 for a defect fixed in 15.1 and higher.