Fix the Mendeley Word Plugin File Not Found Error (System 53)
Question details
The user needs to fix the 'File not found: System (53)' error that occurs when using the Mendeley Word plugin.
- Product
- Mendeley Word Plugin
- Device & OS
- not provided
- Scenario
- Attempting to use the Mendeley citation add-in within Microsoft Word for academic or professional referencing.
- Observed behavior
- A 'File not found: System (53)' error dialog appears, which prevents the Mendeley plugin from functioning properly in Word.
Before proceeding, verify that both Microsoft Word and your Mendeley Desktop application are fully updated to prevent basic compatibility issues.
Consult Mendeley Official Support Documentation
Since Mendeley is a third-party add-in, Microsoft does not provide direct support for its specific system errors. You must consult Mendeley's resources.
The 'File not found: System (53)' error is triggered by the third-party citation add-in itself, rather than a failure within Microsoft Word. Resolving it requires troubleshooting the Mendeley application installation and its integration settings.
Open your web browser and navigate to the official Mendeley Support website.
Use the search bar on their support page to look up the exact phrasing: 'File not found: System (53)' to find targeted articles.
If the official troubleshooting steps do not resolve the issue, use the contact options on the Mendeley website to open a support ticket.
Switch to WPS Office for a Smoother Writing Experience
If third-party plugin conflicts and add-in errors in Microsoft Word are slowing down your workflow, consider using WPS Office. It provides a lightweight, fast, and free alternative that is highly compatible with Microsoft formats, ensuring your document editing remains uninterrupted.
- 1. Download WPS Office: Visit the official WPS Office website and click the free download button for your operating system.
- 2. Install the Application: Run the downloaded installation file and follow the on-screen instructions to set it up.
- 3. Open Your Documents: Launch WPS Writer and open your existing Word files directly to continue working without hassle.

Frequently Asked Questions
What causes the System 53 error in Microsoft Word?
The System 53 error is typically caused by the Mendeley Word plugin failing to locate a necessary file or library on your system to execute its citation functions. It is a third-party add-in issue rather than a Word software bug.
Will Microsoft support fix the Mendeley plugin error?
No. Because Mendeley is a third-party product, Microsoft does not offer support or warranties for it. You will need to contact Mendeley support for specialized troubleshooting.
Can reinstalling Mendeley fix the File Not Found error?
Yes, completely uninstalling the Mendeley Word plugin via the Mendeley Desktop app and reinstalling it can often restore the missing files and resolve the System 53 error.




