BAPI for Scheduling Agreement Scales

Hello,

I want to add Scales to my Scheduling Agreement.

Tried using BAPI_SAG_CREATE, I was able to successfully create a Scheduling Agreement but it says that "No scales exist". According to the FM documentation, scales are not supported during the creation of outline agreements.

Tried using BAPI_SAG_CHANGE using the Scheduling Agreement created but I always get a dump and points me to a standard code.

Runtime Errors         GETWA_NOT_ASSIGNED

ABAP Program         SAPLMEOUT

Include                      LMEOUTP14

Row                          1,454

Module type              (METHOD)

Module Name           POST

If these BAPI will not work, my last option would be BDC.

Thanks in advance.