Oracle ORA-12545 connect failed because target host or object does not exist

Hi,

You can get ” ORA-12545 connect failed because target host or object does not exist  ” error when connect to database via Toad or PLSQL Developer.

If you got ORA-12545 connect failed because target host or object does not exist error, probably you used hostname or scan name instead of Public IP adress or Scan IP.

You can try in CMD using nslookup if your client will resolve hostname or not

nslookup hostname

nslookup SCAN-NAME

 

To solve this problem you need to change DNS Server  and use same dns server with database server.

If you don’t change dns server then you should use Public IP or SCAN IP instead of hostname, SCAN Name.

Mehmet Salih Deveci

I am Founder of IT Tutorial and Certified Expert about Oracle & SQL Server database, Goldengate, Exadata Machine, Oracle Database Appliance administrator with 10+years experience. I have OCA, OCP, OCE RAC Expert Certificates I have worked 100+ Banking, Insurance, Finance, Telco and etc. clients as a Consultant, Insource or Outsource. I have done 200+ Operations in this clients such as Exadata Installation & PoC & Migration & Upgrade, Oracle & SQL Server Database Upgrade, Oracle RAC Installation, SQL Server AlwaysOn Installation, Database Migration, Disaster Recovery, Backup Restore, Performance Tuning, Periodic Healthchecks. I have done 2000+ Table replication with Goldengate or SQL Server Replication tool for DWH Databases in many clients. If you need Oracle DBA, SQL Server DBA, APPS DBA,  Exadata, Goldengate, EBS Consultancy and Training you can send my email adress mehmetsalih.deveci@outlook.com. -                                                                                                                                                                                                                                                 - Oracle DBA, SQL Server DBA, APPS DBA,  Exadata, Goldengate, EBS ve linux Danışmanlık ve Eğitim için  mehmetsalih.deveci@outlook.com a mail atabilirsiniz.

One thought on “Oracle ORA-12545 connect failed because target host or object does not exist

  • April 29, 2019 at 7:06 am
    Permalink

    We’ve been using Protection One for the past 7 years and knew I have been spending too much. Right now there are several outstanding burglar alarm monitoring solutions on the market that are effectively half the cost for the same level of service. Really worth looking into in order to save dough certainly since quite a few do not demand any agreement that the big dealers require. Disappointing. Has somebody put into use https://safehomecentral.com for security alarm monitoring yet? The savings seems ideal but definitely curious in other peoples reviews ahead of trying somebody brand new.

    Reply