NAVIGATION
This is an old revision of the document!
If a damaged image has been loaded into the file center, the system generated an “Error 500” during the thumbnail is created. The file center is no longer usable as long as the switch “enable thumbnail in list on/off” is set to on.
The system tries to generate the Thumb from the defective picture, what causes this error.
Solution: The image must be deleted. For this we turn “enable thumbnail in list on/off” to “off” with a direct command.
http://example.com/include/inc_act/act_file.php?thumbnail=1 would turn on the thumbnails on the indirect way again.