Shopping Cart Error when using Attributes

[lmjacques]

Hello

 

I have the following error when I try to add an item to my shopping cart that has attribute options available, the error is

 

Fatal error: Call to a member function on a non-object in includes/classes/shopping_cart.php on line 300

 

 

here is my code

 

$this->total += $currencies->calculate_price($attribute_price['options_values_price'], $products_tax, $qty);

 

I have just installed the Images as Options Contrib and don't now why this error is happening.

 

Cheers

[lmjacques]

Can anyone help me with this, I'm really struggling at because of this error my cart isn't working.