Validation Checks in BBP_DOC_CHECK_BADI

Hi All,

When creating a shopping cart, I am trying to stop the processing of the Save or Order logic from happening by raising error messages in the BBP_DOC_CHECK_BADI~BBP_DOC_CHECK method.

I am able to successfully raise the error message, however the shopping cart is then saved or submitted. How do we properly stop the save or submit if there is an error message? I assumed this would happen automatically.