sp1<lang>.msb not found SP2-0750 while connecting as sysdba

sp1<lang>.msb not found SP2-0750 while connecting as sysdba

$ sqlplus "/as sysdba"

Error 6 initializing SQL*Plus

Message file sp1.msb not found

SP2-0750: You may need to set ORACLE_HOME to your Oracle software directory

Action

 

$ cat .profile

ORACLE_HOME=/orahome/oracle/product/9.2.0

ORACLE_BASE=/orahome/oracle

ORACLE_SID=bsnl

umask 022

unset username

PATH=$PATH:$HOME/bin

export PATH=$PATH:/orahome/oracle/product/9.2.0/bin

export PATH=$PATH:/orahome/oracle/product/9.2.0

  

Here ORACLE_HOME is set but it is not exported

added the follwing in .profile or .bash_profile

export ORACLE_HOME=/orahome/oracle/product/9.2.0

export ORACLE_BASE=/orahome/oracle

export ORACLE_SID=bsnl

 

Then the problem is resolved.