Whatever problem you have please first make sure you are using OpenCart 1.5.5 or newer. Please also make sure there are no any other enabled extensions that work with the search results.

I have installed the module but it doesn't show up on the site.

Note that after installing the module you should assign it to one or more layouts and choose a position for each one. It should be done in the Module Instances section.

While installing the module in the admin panel I get a blank screen.

The module can't create temporary MySQL tables. This is usually a limit set by free hosting providers which you should avoid (contact their support for details). A blank screen means there is an error and you don't see it because PHP errors are off on your server. Enable them to get more details about the problem.

I get "Parse error: syntax error..."

Most likely there is a conflict with some other extension that modifies the same part of the OpenCart code. That could be an extension that does something with the search results, optimizes database queries, etc.

List of known extensions that cause problems:

The price slider is not shown although the price block is enabled.

The slider requires the jQuery UI library. It is included into the OpenCart package but some themes don't have it enabled (happens rather rarely). Usually the library is here "view/javascript/jquery/ui/themes/ui-lightness/" and it is usually included into the page through the header.tpl file this way:

<link type="text/css" href="view/javascript/jquery/ui/themes/ui-lightness/jquery-ui-1.8.16.custom.css" rel="stylesheet" />

If you cannot find this code in your theme you might need to insert it manually. You can use the default OpenCart theme as a sample if you are not sure where exactly that code should be.

The filter seems to send a request (it fades out) but the list of products is not updated.

1. Please check that none of your SEO extensions changes URLs in a non-standard way.

The filter works with SEO URLs enabled but some SEO extensions change the default URL format. In such cases the filter may fail to process requests since it doesn't know how to parse the URLs.

2. Make sure the resulting code (check in your browser) contains a DIV element with the "brainyfilter-product-container" id.

This element is used as a container for the data retuned from the server. Brainy Filter does its best to properly insert the container automatically but it may not work with some custom themes.

The filter uses the two lines below to embed lists of products into themes. Please make sure those lines are present in your custom theme (category.tpl) and look exactly the same.

<?php if ($products) { ?>
<?php echo $content_bottom; ?>

There is the "Warning: Error vqmod" message in the admin panel.

Please check if vQmod is installed properly and whether it is the latest version for OpenCart. Also make sure you did not change the default OpenCart directory structure. For example, some users rename the admin directory for security reasons. In this case you should also change paths to the renamed directories in vqmod/xml/brainyfilter.xml and clear the vQmod cache.

When the filter is used the list of products doesn't preserve the display option (Grid/List).

Make sure the theme you're using is for OpenCart 1.5.5 or newer. Old themes saved the display option in cookies and now OpenCart uses storage. You can replace the following code into your old theme:

$.cookie('display');

with:

$.totalStorage('display');

OpenCart files used by vQmod