1. OBCM to OBDX error code mappings are present in the database table DIGX_FW_ERR_COD_MAP where MODULE_ID is CASH_MANAGEMENT.
2. Out of the box, the value in column EXT_SYSTEM_ID for all such rows would be UBS14.5.
3. The value in column EXT_SYSTEM_ID for all such rows will have to be modified during implementation, based on the value derived from below query:

SELECT CONCAT(prop_value,(select prop_value from digx_fw_config_var_b 
where prop_id = 'HOST_VERSION' and determinant_value = '$entity_name$')) 
EXT_SYSTEM_ID from digx_fw_config_var_b where prop_id = 'HOST_NAME' 
and determinant_value = '$entity_name$'; -- replace $entity_name$ with 
correct determinant_value.