Ora-01804:failure to initialize timezone information

Unable to log in after upgrading EBS database from 11.1.0.7 to 11.2.0.4

[Email protected] prod_ebsprod]$ Sqlplus/as SYSDBA
ERROR:
Ora-01804:failure to initialize timezone information


Sp2-0152:oracle May is not functioning properly

FIX:

#############################
# Timezone Specification File
# for 11gr2,time zone file location should by empty
#############################

Export Ora_tzfile= ""

Normal Login:

[Email protected] 11.2.0]$ Sqlplus/as SYSDBA

Sql*plus:release 11.2.0.4.0 Production on Sun June 19 09:05:17 2016

Copyright (c) 1982, Oracle. All rights reserved.


Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.4.0-64bit Production
With the partitioning, OLAP, Data Mining and Real application testing options

Sql>

Ora-01804:failure to initialize timezone information