I’m working from a file spec that includes column-level mappings and indicates that lines will be terminated using CRLF. My imaginary client, Contoso, has a new supplier, and I’m setting up the ETL process to import flat file data from this new supplier. I’ll then demonstrate two workarounds to prevent unexpected errors due to changing line endings. To demonstrate the problem, I’ll show some examples of both LF and CRLF terminated files, and how they behave in SSIS when the package is expecting one type but gets the other. However, these differences can significantly impact the execution of ETL processes and any downstream systems relying on data from those files. The tricky part is that these are nonprintable characters, so opening up a data file with Notepad or a similar editor will not present any visual differences between line feed-terminated files and those using carriage return plus line feed. On most UNIX and Linux systems and some older operating systems, files are created using the line feed character (LF, or ASCII character 10), while files generated in Windows typically use the carriage return and line feed (CRLF, or ASCII characters 13 and 10, respectively) to mark line endings. In every text file, there are unprintable characters called line terminators that mark the end of each line. Fix Inconsistent Line Terminators in SSIS In this post, I will demonstrate how to fix inconsistent line terminators in SSIS to avoid ETL errors. When processing data files using SQL Server Integration Services, it is not uncommon to find files with different end-of-line markers for each line in the file.
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