The processing type Customer Exit allows you to set up a processing type for variables that is specially tailored for your requirements. A customer exit is designed as an enhancement that you can configure with customer-specific logic. The customer exit for variables allows you to set default values for variables using function module EXIT_SAPLRRS0_001.
You can process all variable types (characteristic value variables, hierarchy node variables, hierarchy variables, formula variables, and text variables) using the processing type Customer Exit.
As a prerequisite for this, you must have created a project in transaction CMOD, selected SAP enhancement RSR00001, and assigned this to the enhancement project. You have activated the project.