{assign var=viewedProduct value=false}
{if isset($isViewedProduct)}{assign var=viewedProduct value=$isViewedProduct}{/if}

{assign var=cartProduct value=false}
{if isset($isCartProduct)}{assign var=cartProduct value=$isCartProduct}{/if}

{assign var=relatedProduct value=false}
{if isset($isRelatedProduct)}{assign var=relatedProduct value=$isRelatedProduct}{/if}
{include file="$tpl_dir./includes/product_out_of_stock_@(id).tpl" product=$product isViewedProduct=$viewedProduct isCartProduct=$cartProduct isRelatedProduct=$relatedProduct}