How to fix Error 2325 on Windows Server 2025 / Windows 11

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Why This Error Happens

Error 2325 occurs when SQL Server’s XML parser encounters a malformed XML document, typically during operations involving FOR XML, OPENXML, XML schema collections, or when importing/reading XML configuration files (such as SSIS package XML or Policy-Based Management policies). This usually results from manual edits to XML files that introduce mismatched or improperly nested tags, truncated file transfers, or encoding corruption (e.g., a file saved with the wrong UTF-8/UTF-16 encoding). It can also surface when a third-party tool or custom script generates XML output that violates well-formedness rules expected by the SQL Server XML parser (MSXML/System.Xml).

Step-by-Step Resolution Guide

Step 1: Identify the Offending XML Source

  • Note the exact line number (%u) and tag names (%ls) reported in the error message.
  • Locate the source XML file, stored procedure parameter, or column value being parsed (check SSIS .dtsx files, XML schema collections via sys.xml_schema_collections, or application-submitted XML payloads).
  • Open the file in a text editor that shows line numbers, such as VS Code or Notepad++, on Windows Server 2025 / Windows 11.

Step 2: Validate and Repair the XML Structure

  • Run the XML through a validator (VS Code’s built-in XML extension, xmllint --noout file.xml, or an online XML validator) to pinpoint unclosed or mismatched tags.
  • Check for common issues: self-closing tags written incorrectly (e.g., <Tag> without </Tag> or <Tag/>), case-sensitivity mismatches (<Item> vs </item>), or namespace prefix mismatches (<ns:Tag> closed as </Tag> instead of </ns:Tag>).
  • Manually correct the mismatched tag at the reported line number, ensuring proper nesting order (XML tags must close in reverse order of opening).

Step 3: Check File Encoding and Truncation

  • Confirm the file was saved in a consistent encoding (UTF-8 without BOM issues, or UTF-16 if required by the consuming application).
  • Re-export or re-transfer the file if it was moved via FTP/SFTP in ASCII mode, which can corrupt XML structure mid-document.
  • In PowerShell, verify file integrity with: Get-Content -Path "C:\path\to\file.xml" -Raw | Measure-Object -Line.

Step 4: Re-run the SQL Server Operation

  • If using OPENXML, re-run sp_xml_preparedocument after confirming the corrected XML string.
  • If using an XML Schema Collection, drop and recreate it with DROP XML SCHEMA COLLECTION followed by CREATE XML SCHEMA COLLECTION using the repaired XML.
  • For SSIS packages, reopen the .dtsx file in SQL Server Data Tools (SSDT) to let it auto-validate and resave the XML structure cleanly.

Alternative or Verification Steps

  • Verify the fix by re-running the exact query or import operation that triggered Error 2325; it should complete without the XML parser exception.
  • If the error persists, use SELECT CAST(@xmlVariable AS XML) in a test query to isolate whether the issue lies in the source file or in how the application is submitting the XML to SQL Server 2025.