Some situation occured when cancel the confirmation in CO13

[kizzangcy]

Hi, experts.

Here is my situation.

1. My customer does confirmation with some RFC func,
2. In that RFC func. BDC for CO2 and CO11N are included.
3. BDC logic for CO2, it is designed to add a by-product with '-X' qty in the component view of production order, then add 'X' qty(same qty of added by-product) to another component that already existed. And then, CO11N will be run.
4. When cancel the confirmation my customer dosen`t use RFC func, just do CO13.
5. The logic have to be made is, reducing 'X' qty from a component that was increased 'X' qty when 3.


So, I would like to suggest some solution of this to customer like below...
1. Put the user-exit in CO13 that forbid situation above and then...
2. Develop a program that can handle situation above instead of CO13.

Is this a good solution?

Please share you expert`s experience and knowledge.

Thank you,