The Designer generates a unique ABAP program name when you generate or install the ABAP program for the first time. You can override the generated program name if you are installing or generating the ABAP program for the first time.
If you have registered a namespace with SAP, you can also choose to add a namespace prefix to the ABAP program name. The Designer adds the namespace to the ABAP program name if you are installing or generating the ABAP program for the first time.
You can use long names and namespace when you use the RFC file mode and RFC stream mode.
If you want to override the program name or add a namespace after installing or generating, you need to uninstall the ABAP program from all SAP systems. Then, you can install the ABAP program again with a namespace or program name override. You can enter an ABAP program name up to 30 characters.