On Hand Substitute not Used When Releasing Planned order with Weekly Buckets

Hello,

I am working on below business scenario but not getting the expected results, please help me on this.

1. ASCP Plan: EDD

2. BOM created  as shown below

   

Assembly:	BOMCASE2
			onhand	subs	onhand
10	68324195.REM		0	68324195.Z	100
20	68324195.Z		57

3. Create forecast for Assembly BOMCASE2 for 10 qty

4. Forecast control  set for components are 'Consume' and MRP planning enabled.

After running the collection and plan run, the planned order generated but planned order pegging showing thst demand order created for component which have qty 0, which should not be since the substitute have enough onhand qty.

In planning option, the use substitute check box enabled.

Tnz,

Rajesh