Inventory Load Negative Opening Balance

Hi,

following are thes teps followed

1. Delete setup table 03

2.Fill 2lis_03_bx - mcnb.

3.Load the IP as generate initial status to cube

4. compress with marker update (checnk box not checked)

5.Fill 2lis_03_bf - oli1bw

6.Load IP as init with data transfer

7. compress with  no marker update (check box checked)

8. delete setup table

9.Fill 2lis_03_UM- olizbw

10Load IP as init with data transfer.

11. compress with  no marker update (check box checked)

Result -> i am seeing opening balance for few material as negative and same case for closing stock

in mcnb i am using transfer structure as 2LIS_03_BX and only valuated stocks.

is something missing, what are possibilities to get negative stock