[Byd] How to create a demand plan using API services

Dear SAP Support

I americium utilizing the API work to registry a request plan.

API service:ManageDemandPlanIn

When I sent a petition referring to the assistance library, an mistake 'Processing failed; request program ID ABC does not exist' occurred and I was incapable to register.

I would similar to cognize however to registry a request program utilizing the API service. Is it besides imaginable to registry a request program from the API?

Thank you successful advance.