Quote Originally Posted by mc12345678 View Post
What html_header.php script is referenced above?
What mydebug log(s) have been generated in the logs folder?
I see that the additional images start and end tags are present in the html source code, but as indicated, no additional image(s).

Would suggest to review the installation to ensure that all of the files are properly placed and present.
What are the settings for this module in the admin? There is an option to disregard normal additional images or to disregard the images of this plugin as possibilities.
What type of additional image is expected at that product? One added by this plugin or images added through the normal Zen Cart process?
Thank you for your reply. I've reinstalled Zen Cart again just in case it wasn't any plugins I forgot to uninstall clashing, but the problem still persists even after following all instructions and reinstalling the plugin.
When I switch to show with the plugin to the original display style, all the product details and 'add to cart' box disappears, so I'm using the default ZC display option. I haven't added any additional images through FTP, just with the plugin.
Here's what the latest log has

--> PHP Warning: Use of undefined constant PRODUCTS_OPTIONS_TYPE_SELECT_SBA - assumed 'PRODUCTS_OPTIONS_TYPE_SELECT_SBA' (this will throw an Error in a future version of PHP) in
/includes/classes/observers/class.products_with_attributes_stock.php on line 280.
--> PHP Warning: Use of undefined constant STOCK_SHOW_ATTRIB_LEVEL_STOCK - assumed 'STOCK_SHOW_ATTRIB_LEVEL_STOCK' (this will throw an Error in a future version of PHP) in
/includes/classes/observers/class.products_with_attributes_stock.php on line 319.
--> PHP Warning: Use of undefined constant STOCK_SHOW_ATTRIB_LEVEL_STOCK - assumed 'STOCK_SHOW_ATTRIB_LEVEL_STOCK' (this will throw an Error in a future version of PHP) in
/includes/classes/observers/class.products_with_attributes_stock.php on line 328.
--> PHP Warning: Use of undefined constant PRODUCTS_OPTIONS_TYPE_SELECT_SBA - assumed 'PRODUCTS_OPTIONS_TYPE_SELECT_SBA' (this will throw an Error in a future version of PHP) in
/includes/classes/observers/class.products_with_attributes_stock.php on line 416.
--> PHP Warning: Use of undefined constant STOCK_SHOW_ORIGINAL_PRICE_STRUCK - assumed 'STOCK_SHOW_ORIGINAL_PRICE_STRUCK' (this will throw an Error in a future version of PHP) in
/includes/classes/observers/class.products_with_attributes_stock.php on line 430.
--> PHP Warning: Use of undefined constant PRODINFO_ATTRIBUTE_DYNAMIC_STATUS - assumed 'PRODINFO_ATTRIBUTE_DYNAMIC_STATUS' (this will throw an Error in a future version of PHP) in
/includes/classes/observers/class.products_with_attributes_stock.php on line 455.
--> PHP Warning: Use of undefined constant PRODINFO_ATTRIBUTE_DYNAMIC_STATUS - assumed 'PRODINFO_ATTRIBUTE_DYNAMIC_STATUS' (this will throw an Error in a future version of PHP) in
/includes/classes/observers/class.products_with_attributes_stock.php on line 455.
--> PHP Warning: Use of undefined constant PRODINFO_ATTRIBUTE_DYNAMIC_STATUS - assumed 'PRODINFO_ATTRIBUTE_DYNAMIC_STATUS' (this will throw an Error in a future version of PHP) in
/includes/classes/observers/class.products_with_attributes_stock.php on line 455.
--> PHP Warning: Use of undefined constant PRODUCTS_OPTIONS_TYPE_SELECT_SBA - assumed 'PRODUCTS_OPTIONS_TYPE_SELECT_SBA' (this will throw an Error in a future version of PHP) in
/includes/classes/observers/class.products_with_attributes_stock.php on line 280.
--> PHP Warning: Use of undefined constant STOCK_SHOW_ATTRIB_LEVEL_STOCK - assumed 'STOCK_SHOW_ATTRIB_LEVEL_STOCK' (this will throw an Error in a future version of PHP) in
/includes/classes/observers/class.products_with_attributes_stock.php on line 319.
--> PHP Warning: Use of undefined constant STOCK_SHOW_ATTRIB_LEVEL_STOCK - assumed 'STOCK_SHOW_ATTRIB_LEVEL_STOCK' (this will throw an Error in a future version of PHP) in
/includes/classes/observers/class.products_with_attributes_stock.php on line 328.
--> PHP Warning: Use of undefined constant PRODUCTS_OPTIONS_TYPE_SELECT_SBA - assumed 'PRODUCTS_OPTIONS_TYPE_SELECT_SBA' (this will throw an Error in a future version of PHP) in
/includes/classes/observers/class.products_with_attributes_stock.php on line 416.
--> PHP Warning: Use of undefined constant STOCK_SHOW_ORIGINAL_PRICE_STRUCK - assumed 'STOCK_SHOW_ORIGINAL_PRICE_STRUCK' (this will throw an Error in a future version of PHP) in
/includes/classes/observers/class.products_with_attributes_stock.php on line 430.
--> PHP Warning: Use of undefined constant PRODINFO_ATTRIBUTE_DYNAMIC_STATUS - assumed 'PRODINFO_ATTRIBUTE_DYNAMIC_STATUS' (this will throw an Error in a future version of PHP) in
/includes/classes/observers/class.products_with_attributes_stock.php on line 455.
--> PHP Warning: Use of undefined constant PRODINFO_ATTRIBUTE_DYNAMIC_STATUS - assumed 'PRODINFO_ATTRIBUTE_DYNAMIC_STATUS' (this will throw an Error in a future version of PHP) in
/includes/classes/observers/class.products_with_attributes_stock.php on line 455.
--> PHP Warning: Use of undefined constant PRODINFO_ATTRIBUTE_DYNAMIC_STATUS - assumed 'PRODINFO_ATTRIBUTE_DYNAMIC_STATUS' (this will throw an Error in a future version of PHP) in
/includes/classes/observers/class.products_with_attributes_stock.php on line 455.

Based on what the logs are telling me the Stock By Attributes plugin I added on is giving me errors. Is there a way to fix this or should I uninstall Additional Images and upload additional images through FTP?