Victor. Thaks for your reply.

I checked error log path assigned to sql and also in registry. They all looks fine. I can open the error log file from windows explorer. Also noticed that SQL error log shows logs related backups/restore but corresponding SQL Agent jobs shows no history for these runs.

I tried to view SQL error log from SSMS from different SQL machines but no success with this particular SQL server. It opens fine for other SQL Servers.

No idea where I should look for.

Thanks.

JP