https://userapps.support.sap.com/sap/support/knowledge/en/2666443
2666443 - New custom fields in table AUFK are not reflected in FMDERIVE | SAP Knowledge Base Article
You make some changes to the AUFK table adding new custom fields. You already have a number of derivations in FMDERIVE using a function module to reference the...
https://userapps.support.sap.com/sap/support/knowledge/en/2412752
2412752 - LSMW or Mass data upload for FMDERIVE | SAP Knowledge Base Article
You are looking for a mass data upload tool for entering values in FMDERIVE LSMW is not available for FMDERIVE nor FMDERIVER
data upload
https://userapps.support.sap.com/sap/support/knowledge/en/2491908
2491908 - FICUSTOM401: FMDERIVE Consistency Check 01 error during WRX RMRP | SAP Knowledge Base...
You are using Funds Management in an S/4HANA system, or migrated from an older release with Funds Management active to S/4HANA You receive error FICUSTOM401...