The NTFRS member object for the Read-only Domain Controller %1!S! could not be deleted. This may occur if DFSR was unable ...

The NTFRS member object for the Read-only Domain Controller %1!S! could not be deleted. This may occur if DFSR was unable to connect to the Primary Domain Controller. Please correct the problem and retry deletion of the NTFRS member object by executing the command 'dfsrmig /DeleteRoNtfrsMember' on a writable Domain Controller. 
 
Additional Information: 
Read-Only Domain Controller: %1!S! 
Error: %2!S! (%3!S!)