Image Handler 4 (for v1.5.x) Support Thread

[dennez]

So, both shops typically show different information (or are controlled by different ZC code)? If so, installation of IH4 needs to be performed in the path of both shops, separately. If both addresses point to the same location, then things might be different. It looks like the code of one shop is being used by the other (photo reference at least) and as such is trying to pull the photo from a non-existent directory. Might need to use your htaccess to push the photo reference into your /shop/ directory, otherwise you may have a setup error in your configure.php file. But my answer depends on knowing more of what your setup is, which that list of info has been recently provided by Diva Vocals

Thank you MC... Both addresses point to the same location (sharing the same fileset)

subdomain.myshop.com is pointed to myshop.com/shop via the cpanel subdomain setting

my configure shows the following:
define('HTTP_SERVER', 'http://myshop.com');
define('HTTPS_SERVER', 'https://myshop.com');
define('ENABLE_SSL', 'true');
define('DIR_WS_CATALOG', '/shop/');
define('DIR_WS_HTTPS_CATALOG', '/shop/');
define('DIR_FS_CATALOG', '/home/directory/public_html/shop/');

htaccess has some wordpress specific items such as w3cache and page caching etc.
This is the only thing not in wordpress comments:
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]

I couldn't find a list by DivaVocals, but I hope that this might be what you are looking for. :)
Thank you.