Diagnosis
If SDCCN is running on a Solution Manager system, the RFC connection'NONE' is used instead of a BACK-Destination. Adding 'NON' to the listof RFC connections in SDCCN failed.

Procedure
Start transaction SDCCN and choose menu 'Goto' -> 'Settings' ->'Task-specific'. Click on the icon behind 'RFC destinations' ->'Settings'. Switch to change mode and press the button for adding anentry. In the popup window, enter 'NONE' in the destination field andprovide a description. Press 'Continue' twice and save.