Requisitions from Part Requirement

Hi,

We have a Main Inventory Organization (008)

And we have two Sub inventories:

1. ESC : Main Sub inventory

2. ESC-T : Technician Sub inventory

Now looking at a case when the part is available in the main Sub inventory ESC.

a. Created Part Requirement: Destination sub inventory is ESC-T.

b. When added requirement line details, Reservation created.

Now, what if the part is not available in the subinventory ESC:

a. Created Part Requirement.

b. When tried to add requirement line, cannot add since parts not available.

If the part is not available in the main sub inventory, and main sub inventory and the technician sub inventory are in the same organization, how can we generate requisitions?