Hi Vaibhav,
The product proposal performs a billing simulation in IS-U based on a number of parameters (e.g. consumption segment). Furthermore, a number if BAdIs influence the product proposal. For details regarding the configuration as well as the involved BAdIs see:
- Product Proposal - Functions in Enh. Cust. Service and Sales in IC for Utilities - SAP Library
- Product Proposal: Configuration of the Backend System - Functions in Enh. Cust. Service and Sales in IC for Utilities - …
I would suspect, that due to some configuration error the billing simulation in IS-U fails. Consequently no product proposal result is returned and the GET_RELATED_ENTITIES method returns an error. Pleas check that the configuration of both, CRM and IS-U is correct. You can also verify that the billing simulation worked in IS-U using EA01.
Best,
Christian