I have a very weird behaivour. I have activated MRP for a plant and in a material i have define V1 as MRP run and HB as lot size (replenish to maximum stock). I upload stock with 561 movement type and then i run MRP. However, the MD03 does not show the available stock (it shows zero - 0 ) and it creates a PR for the total quantity it needs to go from zero stock to the maximum stock.
In addition, if i double click at MD04 result at the 1st line where the stock is zero, it shows as untrestricted quantity 4, which is the quantity i have in stock!!!