ERROR_XML_ENCODING_MISMATCH - 14100 (0x3714)
The character encoding in the XML declaration did not match the encoding used in the document.
Updated: Feb 21, 2026
Technical Meaning
This error indicates that the character encoding specified in an XML document's declaration does not match the actual encoding used within the document. This mismatch can lead to parsing errors and incorrect interpretation of the content.
Error Details
The error is typically encountered when a program attempts to parse an XML file but finds discrepancies between the declared encoding (e.g., UTF-8, UTF-16) and the encoding actually used in the document. Such mismatches are common due to human errors or issues with the source of the XML content.
Usage Context
This error can occur in various scenarios where an application processes XML documents, such as configuration files, data exchange between applications, or parsing user input. It is particularly relevant for developers working with XML-based systems and APIs.
Developer Interpretation
When encountering this error, it is essential to ensure that the encoding specified in the XML declaration matches the actual content of the document. Developers should validate the encoding during development and consider using tools or libraries that can automatically detect and handle such mismatches.
Related Errors
- ERROR_BAD_URI (12006): Indicates an invalid URI, which might be related if the mismatch affects URL parsing within XML documents.
- ERROR_XML_SYNTAX_ERROR (14103): A broader error indicating a syntax issue in the XML document that could include encoding mismatches.
FAQ
Q: Can this error occur with non-XML files?
A: No, this specific error is related to XML documents and their parsing. Other file types may have different errors for similar issues.
Q: Is there a way to automatically fix the encoding mismatch in an XML document?
A: Yes, tools like xmlstarlet or online validators can help detect and correct encoding mismatches in XML files.
Summary
The ERROR_XML_ENCODING_MISMATCH error is a specific technical issue that occurs when the declared character encoding of an XML document does not match its actual content. Developers should ensure consistent encoding practices to avoid this error during development and deployment.