I already know about this options, but the problem is.
I have the same article (precisions uv) with different options.

a) correction
b) BCR

The correction are (for example) +6.00 to -15.00 and the BCR is 8.4, 8.7 and 9.1.
When I take a correction -10.00 I also have to choose wich BCR I need, but, this correction only exists in 8.7.
But when I take a correction (for example) -2.00, this correction exists in BCR 8.4 and 8.7 and I have to choose between these 2 options.

How do I have to install this.

Now I always have the possibilities between the 3 options BCR/Krommin.....