Diagnosis
During batch/valuation type split, the complete quantity has not beendivided between the batch and valuation type split items.

System Response
You cannot maintain the serial numbers for a batch split item until youhave divided the complete quantity of the main item between thebatches.

Procedure
First create all batch split items that are required for dividingthe complete quantity of the main item or reduce the quantity of themain item. Then you can maintain the serial numbers.