Skip to main content
Ex Libris Knowledge Center

SIS error: "Invalid byte 1 of 1-byte UTF-8 sequence"

  • Product: Alma



The SIS job ("Users SYNCHRONIZE using profile Student Information System") shows an error: "Invalid byte 1 of 1-byte UTF-8 sequence."


Unicode characters in general needs to be output in UTF-8 encoding.

Check the input file for special characters (non-Latin diacritics). For example, try to open the file using XML Notepad, or another XML editor. It will signal any errors. When a file is uploaded with special characters in XML, the special characters should be escaped as they are in HTML. This is also the case when uploading a bibliographic file via an import profile.

For example,
Instead of (Unicode Character 'RIGHTWARDS ARROW' (U+2192)), use HTML →

Examples and elaboration in the Blog "Accented characters in SIS import and export".


Additional Information

To reload the file wait for next scheduled job or:

1. Navigate to: Configuration > General > Integration Profiles
2. Edit the profile for: Student Information System
3. Select the "Actions" tab
4. In the "Synchronize" section click: Run.


  • Article last edited: 03-DEC-2019