See the script only '27' values are present , then why the record_source_gm_id is coming null ? sample model attached.
[BORD]: LOAD //RECORD_SOURCE_GM_ID&'|'&CLAIM_NUMBER as "KEY", "RB_CALENDAR_PERIOD" as "Import Month", "RECORD_SOURCE_GM_ID", "CLAIM_NUMBER", "GROSS_CLAIMS_PAID" as "EDW Amount"; SQL SELECT
[RB_CALENDAR_PERIOD] ,[RECORD_SOURCE_GM_ID] ,[CLAIM_NUMBER] ,[GROSS_CLAIMS_PAID] FROM [DWUQV_CLAIM_PAYMENT_TRANSACTION] where [RB_CALENDAR_PERIOD] ='2019-01-01' and RECORD_SOURCE_GM_ID in ('27');