She opened the project, glanced at the control flow, and smiled. The data flow task that pulled transactions from the OLTP database, merged them with the marketing‑campaign table, and loaded the result into the data‑warehouse had been running flawlessly for weeks. Nothing to worry about—right?
She ran the same query directly in :
SELECT TransactionID, TransactionDate, Amount, RegionCode FROM dbo.Fact_Transactions WHERE TransactionDate >= DATEADD(DAY, -1, GETDATE()) She right‑clicked . The preview window opened— zero rows . That was odd. The OLTP database was humming with activity; the finance team swore they’d entered dozens of new transactions the previous evening. ssis-308
A quick glance at the job history, however, told a different story.
Emma checked the and saw:
She traced the source of RegionCode . It was a foreign key to a lookup table, Dim_Region , populated nightly by another SSIS package called RegionSync . Emma opened that package’s logs.
SELECT TOP (10) * FROM dbo.Fact_Transactions WHERE TransactionDate >= DATEADD(DAY, -1, GETDATE()) The result set returned , all with RegionCode = NULL . Aha! The data existed, but the region field—critical for the downstream aggregation—was missing. She opened the project, glanced at the control
[06/13/2026 02:01:03] SSIS Package: RevenueRollup.dtsx [06/13/2026 02:01:03] Error: SSIS Error Code 0xC0202009 at Data Flow Task, OLE DB Source [1]: SSIS Error Code DTS_E_OLEDBERROR. The OLE DB provider "SQLNCLI11" for linked server "(null)" reported an error. [06/13/2026 02:01:04] Error: SSIS Error Code 0xC0047038 at Package: The maximum number of errors that can be returned by an error source has been reached. [06/13/2026 02:01:04] Error: SSIS Error Code 0xC0047038 at Package: The maximum number of errors that can be returned by an error source has been reached. [06/13/2026 02:01:04] Error: SSIS Error Code 0xC0047038 at Package: The maximum number of errors that can be returned by an error source has been reached. [06/13/2026 02:01:04] **Error: SSIS-308 – The data flow task failed to complete successfully.** Emma’s heart skipped a beat. —the dreaded “data flow task failed” message that usually meant something deeper was wrong. She’d seen the code before, but never in a production run. She took a deep breath, poured another cup of coffee, and began her investigation. Chapter 2 – The First Clue Emma opened the Data Flow Designer and inspected the OLE DB Source that queried the Fact_Transactions table. The SQL statement was simple: