Using Product Quantity Discount attribute

[artifaxworthing]

Can anyone help us with using the quantity product discount attribute, we are applying it as stated in the manual but keep getting an error message.

Any help would be great

[lat9]

It would be easier to help if you told us what the "error message" that you're getting is.

[artifaxworthing]

We are trying to add quantity discounts to the attributes as per the manual ie 1:11.99,10:9.99,24:8.99 but it keeps coming up with this error message

Warning: Invalid argument supplied for foreach() in /home/artifaxo/public_html/t-shirts/admin/attributes_controller.php on line 175

Warning: Cannot modify header information - headers already sent by (output started at /home/artifaxo/public_html/t-shirts/admin/attributes_controller.php:175) in /home/artifaxo/public_html/t-shirts/admin/includes/functions/general.php on line 21

any ideas?!!

thanks

this was are original post with error message
thanks