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Image Generation Investigation - Quick Start

TL;DR

Your preset image generation issue has been thoroughly investigated. I've added comprehensive diagnostics to identify exactly why images aren't being created. You now need to run the generation and check the logs to see what's failing.

What to Do Right Now

Step 1: Enable Debug Logging (2 minutes)

Edit your wp-config.php file and add these lines before /* That's all, stop editing! */:

define('WP_DEBUG', true);
define('WP_DEBUG_LOG', true);
define('WP_DEBUG_DISPLAY', false);

Step 2: Run Preset Generation (5 minutes)

  1. Go to: http://localhost:10003/product/heavy-duty-workbench/?pc-presets-admin=12570
  2. Click "Estimate Valid Presets" to see how many will be created
  3. Click "Generate All Presets"
  4. Wait for completion

Step 3: Check the Logs (5 minutes)

Open your terminal and run:

cd /path/to/wordpress
tail -100 wp-content/debug.log | grep -A 5 "Image Generator\|Diagnostic"

Or watch in real-time:

tail -f wp-content/debug.log | grep "Image Generator\|Config Builder"

Step 4: Find Your Issue

The logs will show one of these patterns:

Pattern A: Missing Visual Layers

Visual Layers: 0
ISSUES: No visual layers found

Fix: Configure visual layers in Product Configurator settings

Pattern B: Visual Layers Without Images

Visual Layers: 5
Layers with Images: 0
Choice 123 has no images array

Fix: Assign images to choices in your visual layers

Pattern C: System Requirements

Requirements check failed: Neither GD nor Imagick extension is available

Fix: Install PHP GD extension: sudo apt-get install php-gd

Pattern D: Invalid Images

Image ID 123 is not a valid attachment

Fix: Re-upload images and re-assign to layer choices

Pattern E: Other MKL PC Issues

save_image returned false/null

Fix: Check MKL PC plugin configuration

Step 5: Apply the Fix

See DEBUGGING-IMAGE-GENERATION.md for detailed solutions to each issue.

Step 6: Verify

  1. Apply the fix for your specific issue
  2. Re-run preset generation
  3. Check logs to confirm images are now being created: 
    Image generation successful, attachment ID: 12345

What Was Changed

I didn't try to fix the issue blindly. Instead, I added:

✅ Comprehensive diagnostics - Analyzes every aspect of image generation
✅ Detailed logging - Shows exactly what's happening at each step
✅ Error validation - Checks system requirements before attempting generation
✅ Clear error messages - Each failure point reports why it failed
✅ Complete documentation - Debugging guide with all common issues and fixes

Files to Review

  • SUMMARY.md - Overview of all changes
  • DEBUGGING-IMAGE-GENERATION.md - Complete debugging guide with fixes
  • Logs in wp-content/debug.log - Your specific error details

Why This Approach?

Without seeing your actual environment, logs, and product configuration, I can't know which of many possible issues is causing the problem. The diagnostics will tell you exactly what's wrong in YOUR specific setup, allowing you to apply the right fix immediately.

Need Help?

If the logs show something unexpected or you can't fix the issue:

  1. Copy the diagnostic report from the logs
  2. Note which error messages appear
  3. Share them for more specific guidance

The diagnostic output is designed to be comprehensive but clear - it will tell you exactly what the problem is.

What Happens Now

When you run generation, you'll see detailed output like:

=== IMAGE GENERATION DIAGNOSTIC REPORT ===
Preset ID: 12345
Total Layers: 8
User Layers: 3
Visual Layers: 5
Layers with Images: 5
Image IDs Found: 123, 456, 789
[ISSUES section will list any problems]
=== END DIAGNOSTIC REPORT ===

Image Generator: Starting image generation for preset #12345
Image Generator: Calling save_image() method
Image Generator: Successfully generated image #99999

This tells you exactly what's working and what's not.

Important

  • Presets will still be created even if image generation fails
  • Image generation failure doesn't stop the bulk generation process
  • Start with a small test (use "Estimate" first)
  • The logs are very detailed - use grep to filter what you need

Ready? Go to Step 1 and enable debug logging, then run your generation!