Unable to automatically create Lot expiry / lot retest sample if sub-inventory is added to Inventory

Hi,

1) Enable lot retest/expiry in specifications.

2) Create inventory validity rule with Inventory organisation, sub-inventory and locator . Enable auto create sample.

3) Run concurrent program Lot And Serial Date Notification. Log file is showing all the lot numbers required.

4) Samples are not created automatically

If the Inventory validity rule is created with Inventory organisation alone lot retest/expiry samples are getting created automatically on running the concurrent program Lot And Serial Date Notification.

Could you please suggest