Bill of materials stock dec/inc

Hello, I am using dolibarr 9.0.4, my manufactured product stock is not updating based on row of material I have(I have used virtual product), I tried to put the row material with “-” and manufactured product with “+” but then the row materials just disappeared and some of the stock features are locked I can not enable them I.E “Decrease real stocks on validation of customer invoice/credit note”. Help please?

What you want to do is manufacturing.
There is no manufacturing feature yet in Dolibarr. This is planned for version 11 in january 2020.

I see, thank you very much.

You have external modules that can help

For exemple Factory : https://www.dolistore.com/en/products-services-or-stock/386-Factory--computer-assisted-manufacturing--CAPM-CAMM--for-Dolibarr.html