How to Fix Office Assembly Error When Converting Word to PDF
Question details
The user is unable to convert Word documents to PDF due to an assembly dependency loading failure in Microsoft Office.
- Product
- Microsoft Office 2016 Standard
- Device & OS
- Windows
- Scenario
- Attempting to export or save a Microsoft Word document as a PDF file.
- Observed behavior
- The conversion process fails, triggering an error message stating that the Office version 12 assembly or one of its dependencies cannot be loaded.
Before attempting to repair your Office installation, ensure you have saved all open documents and completely closed all Microsoft Office applications.
Repair Microsoft Office using Windows Settings
Running the built-in Microsoft Office repair tool can fix missing or corrupted assembly dependencies required for PDF conversion.
The Microsoft Office repair utility automatically scans for missing files, corrupted registry entries, and broken dependencies. This is the safest and most effective method to restore the native Word-to-PDF export functionality.
Click the Start button, select the 'Settings' gear icon, and navigate to 'Apps' followed by 'Apps & features' (or 'Installed apps' on Windows 11).
Scroll through your application list or use the search bar to find 'Microsoft Office 2016 Standard' (or your specific Office version).
Click on the Microsoft Office entry, select 'Modify', choose the 'Quick Repair' option in the prompt window, and click 'Repair'. If Quick Repair fails, repeat this step using the 'Online Repair' option.
Once the repair process finishes, restart your computer. Open a Word document and try saving it as a PDF to verify the issue is resolved.
Verify and Reinstall Specific Office Components
If standard repair methods fail, manually comparing and reinstalling specific Office shared features can restore the missing assembly files.
Convert Word to PDF Seamlessly with WPS Office
If your Microsoft Office installation remains corrupted or difficult to repair, switch to WPS Office. It provides a built-in, standalone PDF converter that doesn't rely on Windows assembly dependencies, saving you time and frustration.
- 1. Open Your Document in WPS: Launch WPS Office and open the Word document you want to convert.
- 2. Export to PDF: Click on the 'Menu' button in the top-left corner and select 'Export to PDF'.
- 3. Save the PDF File: Adjust your export settings if necessary, choose the destination folder, and click 'Export' to generate the PDF instantly.
Frequently Asked Questions
What does 'Office version 12 assembly cannot be loaded' mean?
This error means that Microsoft Office is missing critical background files, specific add-ins, or .NET framework dependencies needed to execute the PDF conversion task.
Will running the Microsoft Office repair tool delete my files?
No. The built-in Microsoft Office repair tool only checks and replaces corrupted application files and registry entries. Your personal Word documents and files will not be deleted or modified.
What is the difference between Quick Repair and Online Repair?
Quick Repair runs locally to fix common corruption issues swiftly without needing an internet connection. Online Repair uninstalls and completely reinstalls the Office suite to fix deep-rooted issues, which takes longer and requires internet access.
Are there other ways to convert my Word file to PDF without fixing Office?
Yes. If you cannot fix the Microsoft Office error, you can use online PDF conversion tools, virtual PDF printers like 'Microsoft Print to PDF', or a free Office alternative like WPS Office to export your documents easily.
