Delivery Related problem

Question

Dear Friends,
                        I am using SAP R/3 4.7 version, actually till 30th December there was no problem in delivery but form 1st Jan when I am creating any delivery against any order, it is showing the following error :-***
No schedule lines due for delivery up to the selected date
Message no. VL248
Diagnosis
There are no schedule lines due for the given order item up to the date chosen.
System Response
The system does not create a delivery item for this order item.
Procedure
     Check whether the order item to be delivered contains confirmed schedule lines.
If this is the case, set the selection date further into the future if you still want to create a delivery for this item

Answer 1

Thanks Harry! But problem is still there.
I want to tell you that I am using Factory Calender Germany Standard.
When I am doing stock posting through mb1c, I am getting the following error and I am not getting the way to fix this so if you can fix it I will be highly obliged:
Error is following when doing stock posting for any material:
Number range for trans./event type WA in year 2011 does not exist
Message no. M7562
Diagnosis
The number range for document number assignment has not been maintained in the year 2011 for the transaction/event type WA.
Procedure
Contact your system administrator.
If you are authorized to do so, do you want to check the number ranges for the
u2022     Material documents
u2022     Reservations?