To eliminate unnecessary connection problems, make sure that
The source and destination servers have enough available server and workstation licenses to do the migration.
The NDS® user that you are using to do the migration has no concurrent connection limitations. To check this, do the following:
Run ConsoleOne® on the workstation.
Edit the properties of the NDS User object.
Click the Login Restrictions tab.
Uncheck the Limit Concurrent Connections check box.
The NDS user that you are using to do the migration has the Supervisor right to the source server's NDS object. Use ConsoleOne to verify that the NDS object of the NDS user is listed in the source server's Operators list.