In this scenario, the SSIS package may fail. Additionally, you receive the following error messages:
Error: 0xC02020A1 at Data Flow Task, Flat File Source : Data conversion failed. The data conversion for column "<column_name>" returned status value 4 and status text "Text was truncated or one or more characters had no match in the target code page.".
Error: 0xC020902A at Data Flow Task, Flat File Source : The "output column "<column_name>" (199)" failed because truncation occurred, and the truncation row disposition on "output column "<column_name>" (199)" specifies failure on truncation. A truncation error occurred on the specified object of the specified component.
Error: 0xC0202092 at Data Flow Task, Flat File Source : An error occurred while processing file "<path_of_the_flat_file>" on data row <row_number>.
Error: 0xC0047038 at Data Flow Task, SSIS.Pipeline: SSIS Error Code DTS_E_PRIMEOUTPUTFAILED. The PrimeOutput method on component "Flat File Source" (1) returned error code 0xC0202092. The component returned a failure code when the pipeline engine called PrimeOutput(). The meaning of the failure code is defined by the component, but the error is fatal and the pipeline stopped executing. There may be error messages posted before this with more information about the failure.