Quote Originally Posted by mc12345678 View Post
While I don't necessarily have the answer of what template is fully compatible with 1.5.6a, I do have a few ideas/suggestions about how you can get your existing template to likely work with it. Should understand that the files applicable to the selected template if installed and designed properly sit in a sub-folder associated to the template's name. As a result, they override the default version of that file.

There have been changes to the underlying processing that may not align fully with those template files. If you (or your website developer) were to update your template's files to more closely match those of the default (or as required the responsive_classic equivalent) then the problems may be resolved.

Beyond that, anytime you have a blank or partial blank screen, a mydebug file should be expected in the logs folder. Tackle those and the problems should be able to be resolved. For further information see: http://www.zen-cart.com/content.php?124-blank-page
Thank you for your quick reply and suggestions!

The problem for us is that files of a template are all over the place, not only in a template folder.
We don't have the skills to figure out where all the info on the screen is comming from.
If I take the winchester resposive template as an example, files are located under includes under folders auto_loaders, classes, extra_datafiles, functions, init_includes, languages and template folder, the same under admin folder. This is not for normal people anymore. A template is not just a set of files in the template folder.

Since I skipped 1.5.5 releases (why change a perfectly good running shop with 1.5.4), I am completely lost now.
I wonder how other people fix this problem.

Next to that, I used apsona shop manager to update my products. They removed the platform so I can't connect anymore.
I also have shopmanager that worked fine on 1.5.4 but it does not connect to the (new?) database: "this is not a zencart/oscommerce database".
Thank you php 7 :-) The old shop would have worked forever.

To be safe, we started testing prestashop. If we can't find experts to fix zencart templates, we are out of a B2B system.