AFS MRP Error

We are facing a problem on AFS MRP run. After certain period of time suddenly MRP not generating any planned order. After investigating that all the relevant master data are correct, there is no changes in customizing, sales order requirement available, stock not still produce, planning file are correctly maintain, number range also not reach at target level. 
After several attempt of trying solve the problem we still not get any rote causes.

I am  not getting where the missing point of not generating any requirement