[Derived Column[2]] Error: The "Derived Column" failed because truncation occurred, and the truncation row disposition on "Derived Column.Inputs[Derived Column Input].Columns[WeightUnitMeasureCode]" specifies failure on truncation. A truncation error occurred on the specified object of the specified component.

[SSIS.Pipeline] Error: SSIS Error Code DTS_E_PROCESSINPUTFAILED.  The ProcessInput method on component "Check Nulls" (2) failed with error code 0xC020902A while processing input "Derived Column Input" (3). The identified component returned an error from the ProcessInput method. The error is specific to the component, but the error is fatal and will cause the Data Flow task to stop running.  There may be error messages posted before this with more information about the failure.

Expression : 

ISNULL(WeightUnitMeasureCode) ? "UNKNOWN" : WeightUnitMeasureCode

Data Type :     Length

Unicode string [DT_WSTR] 3

Please help me out get rid of this error.

• Edited by Fmalik 4 hours 4 minutes ago

Did you check that WeightUnitMeasureCode is not bigger than  [DT_WSTR] 3? Truncation can mean that the source data is too big/long/more characters than can fit in the destination. Do you know which row it failed on? You can look at source data for anything unusual. Maybe that row is different format for some reason.