Call now: 252-767-6166  
Oracle Training Oracle Support Development Oracle Apps

 E-mail Us
 Oracle Articles
New Oracle Articles

 Oracle Training
 Oracle Tips

 Oracle Forum
 Class Catalog

 Remote DBA
 Oracle Tuning
 Emergency 911
 RAC Support
 Apps Support
 Oracle Support

 SQL Tuning

 Oracle UNIX
 Oracle Linux
 Remote s
 Remote plans
 Application Server

 Oracle Forms
 Oracle Portal
 App Upgrades
 SQL Server
 Oracle Concepts
 Software Support

 Remote S


 Consulting Staff
 Consulting Prices
 Help Wanted!


 Oracle Posters
 Oracle Books

 Oracle Scripts

Don Burleson Blog 







ORA-01804 start Oracle

Oracle Tips by Donald BurlesonMarch 20, 2017

Question: What causes the ORA-01804 error?

When I try to create Oracle 10g database, I get below error.

$ sqlplus /nolog

ORA-01804: failure to initialize timezone information

SP2-0152: ORACLE may not be functioning properly


Answer:  First, try connecting as SYSDBA. 

There are several causes for the ORA-01804 error:

- Check to make sure the following paths are set correctly in your environment: 


- Your oracle client may be missing some timezone dat files in the $ORACLE_HOME directory. You should have a separate ORACLE_HOME for each release of Oracle.

-  Check that the permissions are set to allow reads (chmod 444) for the files in the OCCI library.


The oerr utility shows this for the ORA-01804 error:

ORA-01804: failure to initialize timezone information

Cause:  The timezone information file was not properly read.

Action:  Please contact Oracle Customer Support.

The first thing to do is to check if ORA_TZFILE is set and if it is, remove it and restart the database and listener. Oracle will then try to load the $ORACLE_HOME/oracore/zoneinfo/timezlrg.dat file.

If for some reason the file that Oracle wants to use is not available then this is the cause of the problem.

If the file is present then an alternative reason for the error could be that Oracle cannot load the file because of permission problems.

If all above is correct then it might be a .dat file that is corrupt.

Oracle Training from Don Burleson 

The best on site "Oracle training classes" are just a phone call away! You can get personalized Oracle training by Donald Burleson, right at your shop!

Oracle training

  Oracle consulting and training


Burleson is the American Team

Note: This Oracle documentation was created as a support and Oracle training reference for use by our DBA performance tuning consulting professionals.  Feel free to ask questions on our Oracle forum.

Verify experience! Anyone considering using the services of an Oracle support expert should independently investigate their credentials and experience, and not rely on advertisements and self-proclaimed expertise. All legitimate Oracle experts publish their Oracle qualifications.

Errata?  Oracle technology is changing and we strive to update our BC Oracle support information.  If you find an error or have a suggestion for improving our content, we would appreciate your feedback.  Just  e-mail:  

and include the URL for the page.


Burleson Consulting

The Oracle of Database Support

Oracle Performance Tuning

Remote DBA Services


Copyright © 1996 -  2020

All rights reserved by Burleson

Oracle ® is the registered trademark of Oracle Corporation.



Oracle Training at Sea
oracle dba poster

Follow us on Twitter 
Oracle performance tuning software 
Oracle Linux poster