how to restrict a particular formula and receipe for not populating in the ascp workbench

Hi,

Scenario

recipe is : R1

formula item :A

product item:A

byproduct item:B

ingredient item:I

Again

recipe is : R2

formula item :I

product item:I

ingredient item:C

all the above recipe is valid recipe and it is comming in the ascp workbench....not an issue and this is actual indented BOM.(formula)

Now I want to restrict one recipe and formula for not comming to the ascp workbench since it is non standard.

recipe is : R3

formula item :I

product item:I

ingredient item:B

Kindly guide us to reach this functionality......