Got it!!! Thanks to Marg from an archived thread
If you're getting this error when trying to copy attributes:
Here is the solution:
In admin/includes/functions/general.php, find the following line:
'" . $products_copy_from->fields['options_values_price'] . "',
Right under it, add this line:
'" . $products_copy_from->fields['options_values_price_w'] . "',
Now in the same file, just a little further down, find this line:
options_values_price='" . $products_copy_from->fields['options_values_price'] . "',
Add this line right underneath:
options_values_price_w='" . $products_copy_from->fields['options_values_price_w'] . "',
It works beautifully now
