BOM issue

Dear all,

i create bom journal and posted the 2 quantity and it was posted successfully.

now i am trying to post more 6 quantity with some changes in the BOM line so i am getting the below error.

please if some one can help me to solve this issue.

The inventory value of -50.00 is not expected after the proportional expense calculation. The expected value is -35.54.

Dear Husain,

I guess the item had been setup with inventory model Moving average on IMG.

Please give more us details as to understand what could have went wrong. What changes you had done to BOM lines more specifically. Also read through the following to understand how system accounts the item cost in case of Moving average costing: