negative balance

[M_NADIM]

Hi To All

We have Oracle Application (EBS ) r11i ; our problem is :
We also know that he is not allowed drainage negative in the program storage, and when the exchange negative message appears stating the impossibility of implementing the movement that he would balance will be negative, but when moving descrite job in the operational phases, and there are components are operation pull , the program regardless of the quantity Although there is no balance in stocks and the balance becomes negative.