Hi,
Are you trying to change the dates at the schedule line level?.
If so the dates in respective fields will come automatically, according to your required delivery date that you enter at schedule line.
If you are trying to input other dates like goods issue date, loading date etc.. then, those should be in the correct logical sequence ( ex : first material should be available , then do picking then trans planning then GI). else system will give this error.
Hope, this explains
Regards
Jobi
