COIN Error
Controlling Document Number Assignment Not Possible

Solution:
 Go to T Code KANK
 Click on Copy As icon.
 Give Details, From = 1000 & To = Your Controlling Area Code.
 Then click on Intervals
o If it displays No Interval For Object/Sub object RX_BELEG 1501.
 Then give your Controlling Area Code in CO Area field.
 Click on Maintain Groups.
 Click on Crate Icon.
 Give Group Name (Ex – CO Number Range).
 Give From & To Numbers & Save it.
 Go back & click Ctrl + F & enter COIN.
 Then Single Click on COIN
 Click on Element/ Group
 Double click on CO Number Range & Save.