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Quick Fix: "Failed to load PDF document" Error

Problem

You're seeing this error when trying to open a PDF file in the Archive directory.

Cause

The file has a .pdf extension but is actually a plain text file (not a real PDF).

Quick Solutions

✅ Solution 1: Use LibraDigit AI (Easiest)

  1. Open LibraDigit AI
  2. Go to "Upload & OCR"
  3. Upload the problematic file
  4. The system will automatically detect it's a text file and extract the content
  5. Continue with the normal workflow

✅ Solution 2: Convert to Real PDF

cd backend
python convert_text_to_pdf.py "Archive/"

This will:

  • Scan all files in the Archive directory
  • Find text files with .pdf extensions
  • Convert them to proper PDF documents
  • Skip files that are already valid PDFs

How to Check if a File is Text or PDF

Text File Signs:

  • Very small file size (e.g., 92 bytes)
  • Can be opened in Notepad
  • Shows plain text when opened

Real PDF Signs:

  • Larger file size (typically 1KB+)
  • Opens in PDF readers
  • Shows formatted content

Example

Before:

File: Latha_2025_Veterinary Clinic.pdf
Size: 92 bytes
Type: Text file
Status: ❌ Error

After Conversion:

File: Latha_2025_Veterinary Clinic.pdf
Size: 1,822 bytes
Type: Valid PDF
Status: ✅ Works!

Need More Help?

See detailed documentation:

  • HANDLING_TEXT_PDF_FILES.md - Complete guide
  • backend/CONVERT_TEXT_TO_PDF.md - Conversion tool docs
  • README.md - Main documentation