Have you tried to pass '0G' to the method cl_usmd_model_ext=>get_instance?
Somthing like:
CALL METHOD cl_usmd_model_ext=>get_instance
EXPORTING
i_usmd_model = '0G'
...
Have you tried to pass '0G' to the method cl_usmd_model_ext=>get_instance?
Somthing like:
CALL METHOD cl_usmd_model_ext=>get_instance
EXPORTING
i_usmd_model = '0G'
...