Finding the Internal ID of a Custom Child Record Sublist

To get the internal ID of a custom child record sublist :

1. Go to the record definition for the custom record type.
2. On the Fields subtab, find the field which is related to the parent record.(Here Service Order (internal ID: custrecord_jj_service_order)) It is the parent field for this custom record.
3. Now, we need to add “recmach” infront of the internalID.
4. Therefore, the internal ID for the custom child record sublist is “recmachcustrecord_jj_service_order”.