​how can active material ledger in S4/hana

hello ,

In ECC 6 with t.code CKMSTART active material ledger.

but i don't know in S4/hana use t.code CKMSTART or active Material ledger with program FCML4H_STARTUP.

please explain differences between t.code CKMSTART and FCML4H_STARTUP.

Regards.

Ali Akbar Mirnia