Schedule line error ,urgent,urgent

Question

dea sap expert:
I have schedule line error , please help
I have part 9173191-04.
There is schedule line as below
10th Feb 72
10th Feb 72
17th Feb 172
On 23th Feb , the stock is zero.
Due to our factory want to GR early than 17th Feb.
Material planner change lastest schedule date from 17th to 10th .
After she change ,  schedule line as below
10th Feb 72
10th Feb 72
10th Feb 172
17th Feb 12
On 23th Feb , the stock is 12 PC.
Could you help to explain , why it generate another 12 PC .
And make there are 12PC we will never be used it.
Please help me on it .
Thanks so much.
Below is the material master information .
MRP Type             P1     
Reorder Point        0                    Planning time fence  10
Planning cycle       Z05 (Friday )
Lot size             SB
Rounding value       72
Procurement type     F                    Batch entry
Special procurement                       Prod. stor. location AS03
Quota arr. usage     3                    Default supply area
Backflush            1                    Storage loc. for EP  XT06
JIT delivery sched.                       Stock det. grp       REM
In-house production  0   days             Planned Deliv. Time  0   days
GR Processing Time   0   days             Planning calendar    Z05(Friday )
SchedMargin key      LOC
Safety Stock         0                    Service level (%)    97.0
Min safety stock     0                    Coverage profile
Safety time ind.     2                    Safety time/act.cov. 7  days
STime period profile

Answer 1

Hi,
>Wish to know when & why does the schedule line Exist tab in sales order trigger.
Schedule line is a place where you can define different delivery dates for a single line item.
Let's say, you have one line item for quantity 1000. Now if your production department and planning department saying they can deliver it in a weekly basis.(Say 250 for each week)
In that case you have 2 options.
One is to create 4 separate line items instead of original line item with different delivery dates and relevant quantities.
You can create delivery from VL01N or VL10C here for relevant line item.
Else
have 4 different schedule lines with delivery dates and relevant quantities
You can do delivery from VL10E for this case for relevant schedule line.
Same is happening when ATP is triggered, where system suggest different delivery dates as different schedule lines.
So it's based on ATP or it can be your decision as well.
>when I try to do the delivery I get an error u201CNo schedule lines due for delivery up to the selected date u201D.
This can happen for many reasons.
1 - Because the "Selection Date" you have given in the VL01N screen is not equal or greater than the "delivery date" you have maintained in the schedule lines.
Always make sure below rule.
"Selection Date" of the VL01N > "delivery date" you have maintained in the schedule lines
Therefore change the date in the "Selection Date"  of the VL01N to "delivery date" you have maintained in the schedule line or forward date and try.
2 - You don't have confirmed stock.
Check your schedule line tab for "Confirmed quantity" column, if you don't have a value there, this error comes. This happens when you haven't done ATP.
Best regards,
Anupa