Express Document "Update was terminated"

Hi,

When I am saving the Shipment Document in Transaction VT01N, I am getting the error 'Express Document "Update was terminated"'.

I know that this is something to do with the Number Ranges. I have checked the Number Ranges for Shipment as well as Handling Unit. Both are correct, but still this error is coming. I have also noticed that it is updating the status of Number Ranges wrongly.

Please give your inputs immediately. It is very urgent. I have to solve this issue before this afternoon. Your help will be highly helpful

Thanks and Regards

Vijay