Delivery split based on Weight

Hi

I have a requiremnet where while creating delivery from a sales order, based on the weight in line item of the order,  multiple deliveries has to be created.

For example, when the cumulative weight of the line items exceeds 500000LB, the delivery should split and for 1 sales order we must have 2 deliveries.

I have created a copy routine in VOFM and I am setting the value of LIKP- ZUKRL but it doesnt help.

The routine  configured in VTLA at header data under Data Transfer.

Any help is appreciated.

Thanks

Jyoti Mishra