Symptom
US_ACH format cannot be found in Activity / SSCUI 100558 "Map Format Data for Payments" and so custom format cannot be created.
Environment
SAP S/4HANA Cloud
Cause
US_ACH format does not use DME engine, so it is not possible to edit it in any way in Map Format Data for Payments.
Resolution
Use as a base US_ACH_DD. It has the same structure even if the description says "Direct Debit". Make a copy of US_ACH_DD and do any changes in Map Format Data for Payments.
Keywords
US_ACH, US_ACH_DD, DME, DMEE engine, Map Format Data, payments, SSCUI 100558 , KBA , FI-FIO-AP-PAY-2CL , Payment Apps (Public Cloud) , How To
Product
SAP S/4HANA Cloud Public Edition all versions
SAP Knowledge Base Article - Public