Not generating billing schedules when Evergreen ESS job is ran on existing subscription

Summary:

"Generate Bill Lines for Evergreen Subscriptions and Subscriptions with Pricing Terms" Program is not creating Bill Lines on the existing Subscriptions that do not have end date for usage item.

tried steps below,

• Created Order with line status as DRAFT. This will allow to subscription to create in DRAFT status.

• Once subscription is created, updated the product line end date as null and activated.

• Performed some usages and interfaced to AR.

Ran Generate Bill Lines for Evergreen Subscriptions and Subscriptions with Pricing Terms program but no luck, I couldn’t see the next billing schedule are getting populated.

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