3266913 - Usage of foreign fields in Data Source Extensions

You expect to see and/or select Custom Fields originated from external/manual CDS extends when creating Data Source Extensions via "Custom Fields" Fiori App. 

Existing Data Source Extensions where this type of custom fields were already selected, lead to errors in the "Custom Fields" and/or other Fiori apps that use the corresponding Data Source.

The “Field Selection” tab in the “Data Source Extension” editor of “Custom Fields” App only shows CDS extends, which were created by other custom fields or data source extensions created using the "Custom Fields" App.

• S/4HANA

F1481 CL_CFD_DE_PATH_PARSER PARSE_VIEW "Invalid path. Found unexpected segment" "An internal error has occurred on the server" CX_SADL_ENTITY_UNKNOWN_ELEMENT , KBA , BC-SRV-APS-EXT-FLD , Custom Fields , Problem