Variants don't show their individual reference numbers

[joansplr]

In my product settings I can choose individual reference numbers for my variant. But on the product pages in my shop theres always only the main reference number of the product which does not change when switching the variant. I found this in my product-details.tpl:

{if isset($product.reference_to_display) && $product.reference_to_display neq ''}
  <div class="product-reference">
    <label class="label">{l s='Reference' d='Shop.Theme.Catalog'} </label>
    <span itemprop="sku">{$product.reference_to_display}</span>
  </div>
{/if}

Is there any method to make the number change when switching product variant? Im using version 1.7.6

[JBW]

It's working fine in classic theme and is done in Javascript event dynamically. If this is missing in your theme you should contact it's developer.

[giannisbou]

Just solve this problem...

from this path classic(theme)/templates/catalog/_partials product-details.tpl

 

I copied the <div id="product-details">

and place it like this 

<div id="product-details">

{if isset($product.reference_to_display) && $product.reference_to_display neq ''}

      <div class="product-reference">

        <label class="label">{l s='Reference' d='Shop.Theme.Catalog'} </label>

        <span>{$product.reference_to_display}</span>

      </div>

    {/if}

</div>