Sourabh
thank you for your reply.
I have checked your provided discuss, but I can not find clue.
in our company, according to business requirement, the system will check according to stock , if there is no enough stock, the system should check it based on the forecast.
when I configure this, if I separately use stock check or forecast check, there is no problem, if I combine them, the system only take stock.
do you know the special setting?
by the way for the check mode, it is 050, for the product requirement, it is 20.
thanks!