Before Material Ledger Production Setup in S/4HANA, please check these notes:

 2577551 Material Ledger Production Setup in S4HANA (Green field approach)
 2555648 Currency setting changes with active Material ledger in SFIN & S/4HANA 
 2553586 S/4HANA: error MLCCS009 or C+099 or missing cost component split data in table MLDOCCCS
 2512618 Cases when to deactivate Material Ledger and carry out new productive start
 2605071 S/4HANA: Enable reset of Material Ledger and Actual Costing - Only for test systems
 2523145 OBR1: reset for company code not possible, since MM-IM data exists in MATDOC
 2435848 S/4HANA: Prevent that transaction OBR1 is executed, if S/4HANA MM-IM and Actual Costing data exist
 2909221 Error FINS_ML_START013 in transaction OBR1
1511335 Material ledger currencies are changed in CO - Error message no. C+039

  
2512618 Cases when to deactivate Material Ledger and carry out new productive start
2555648 Currency setting changes with active Material ledger in SFIN & S/4HANA