Actual costing needs to be set live; call transaction FCML4H_STARTUP

What causes this issue?

You have activated actual costing for plant after material ledger was
set live for this plant.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

You need to generate content for some data structures by running
transaction FCML4H_STARTUP (Set ML Actual Costing as Productive
(retroactively)

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.