So - what are you talking about if you say 'migration' - a NW client (I guess) or the NW server? - And the NW versions are also helpful. To me it looks as if there are 3 issues involved: hostname/IP resolution, the servers file and the host/peer entries which are stored in the nsrladb directory. If the first 2 issues are working fine, you should rename/delete the nsrladb directory on the client and restart the NW services (as suggested by the message) - the db will will be re-build automatically.  
Hi, I recently migrated to server 2012 and have been having issues with networker backups. Unable to start networker remote exec service and snapshot mgmt service. Also i am unable to open nsradmin. when i try to open nsradmin, this is the output:  C:\>nsrports 173680:nsrports: RPC client handle: No connection could be made because the targ et machine actively refused it. . 172089:nsrports: Unable to create the connection with 'portmapper' to host 'loca lhost6' with address '::1' at port number 7938. 173677:nsrports: Check whether the client services are running on the host '::1' . 173680:nsrports: RPC client handle: No connection could be made because the targ et machine actively refused it. . 172089:nsrports: Unable to create the connection with 'portmapper' to host 'loca lhost' with address '127.0.0.1' at port number 7938. 173677:nsrports: Check whether the client services are running on the host '127. 0.0.1'. 145072:nsrports: Unable to get port range from local nsrexecd: Failed to initial ize ports using nsrexecd on ________: Remote system error - No such fil e or directory 173680:nsrports: RPC client handle: No connection could be made because the targ et machine actively refused it. . 172089:nsrports: Unable to create the connection with 'portmapper' to host 'loca lhost6' with address '::1' at port number 7938. 173677:nsrports: Check whether the client services are running on the host '::1' . 173680:nsrports: RPC client handle: No connection could be made because the targ et machine actively refused it. . 172089:nsrports: Unable to create the connection with 'portmapper' to host 'loca lhost' with address '127.0.0.1' at port number 7938. 173677:nsrports: Check whether the client services are running on the host '127. 0.0.1'. 146730:nsrports: Unable to connect to nsrexecd on host ________: Remote system error - No connection could be made because the target machine actively refused it.     This is the what i found in the daemon log; nsrexecd RAP critical Attributes 'name' and/or 'my hostname' of the NSRLA resource do not resolve to the machine's hostname 'wpccda02.upgf.com'. To correct the error, it may be necessary to delete the NSRLA database.   Please advise!  
Backups failing Windows server 2012r2