Your module works perfect. Thank you for that. I am still in a kind of problem with the minimum amounts of products wanted for the wholesale function, unwanted for the retail function. ( I have installed your suggestion ' minimum quantity per product', and al goes fine). So i thought to redirect to a 'normal' shop for retail selling. (My problem is the (working) minimum amount is also active for the retail group.) I have tried to make the addon 'Link to Product Model' by Landho working on Osc CE so i would have a link in the other shop where a customer can buy just one product trough advanced_search_result.php, but this failed. I know this is not a subject for your addon, but I could not find any posts of this matter to help me further. Reason for all of this is that retail customers are confused by the minimum amounts of products in the Wholesale. Hope you can help me.
Best regards, Martin