Hi all,
The issue was with the assigned roles!
SAP_BC_USR_CUA_CLIENT
SAP_BC_USR_CUA_SETUP_CLIENT
The above roles were added to the user maintained in the RFC destination on the Central system to child. However, as the child system was a newly built system, the roles weren't generated with appropriate Profiles.
Generating the Profiles to above roles and User Master Comparison did the trick.
Regards,
Naga