Breakfast package can be added in two ways
1) Through UDF fields
Configure the Meal Plan UDF fields in the Grabber application and MCI BO. Also configure the breakfast codes in the package codes. Once you have enabled the "BreakFastValidationWithUDF" System will check whether any Meal pan UDF filed is configured in the system or not. If it is present then only it will check whether the value in that particular field in Opera is "NP" or not, if it is "NP" system will consider it as "No meal plan" else it will check for the package codes in the Grabber/MCI BO configuration. If any package code in the configuration is present in the UDF field system will consider it as breakfast included.
2) Through Package codes.
Once the system is configured with "BreakFastValidationWithPackage" , system will check for the package codes in the configuration of Grabber/MCI BO application. If it is present system will verify whether any of these package codes are present in the reservation package list or special list. If it is present system will consider it as breakfast present else not.
Note:- If you enabled both system will check both conditions