TeKno Ziz on "[Plugin: PDF Image Generator] Not all thumbnails are generated."

Hi TeKno Ziz.

I don't think it's permissions issue too. I also don't think it's because of the files.
I tried upload your files on my site, and they are converted well. The files were made by the same app and output as the same format.

Maybe the problem is the RAM memory, because pdf files tend to be large.
Have you tested to upload the same one again?
If it works, Increase values in php.ini, for example:

memory_limit = 128M
upload_max_filesize = 64M
post_max_size = 64M

And add the following code to wp-config.php:

define("WP_MEMORY_LIMIT", "128M")

If there is no improvement after setting them, try uncheck "Customize Generated Image properties" in the options setting page of the plugin. If you need only thumbnail size images, this option has no great advantage.