Dataflow errors in SSIS are often caused by invalid data values (for example, string instead of number) and data truncation. To handle unexpected data, SSIS provides the functionality to route the error output to a script component. This script component is used to get a description of the error based on the error code. The errors are then routed to a raw file destination.
When loading data from various sources, such as T-SQL, stored procedures, functions, flat files, or SSIS packages, administrators and developers may encounter a data truncation error. Your error message should indicate which column is causing the problem. To fix this issue, you can increase the width of the column in the connection manager definition and try running it again. Alternatively, you can use the Suggest Types button to have SSIS adjust its data types and lengths based on your data.
Another solution is to convert all output fields into your stored procedure before proceeding with your code. This will make many administrators and database developers satisfied with this detailed SQL truncation error message. If your package fails due to a truncation error in a string column, you can add a dummy row as the first row in the Excel file with data longer than 255 characters in the column that is causing a truncation error. Additionally, you can increase the length of that column or change its data type to ntext. By following these solutions, you can fix the truncation error while reading an Excel source code and your package will run successfully.
This is an effective way for developers and database administrators to quickly fix errors related to silent truncation of data.