sqlplus issues

Hi,  

We installed the oracle 10g on solaris 10 and getting following error:  

$ sqlplus

Error 6 initializing SQL*Plus

Message file sp1<lang>.msb not found

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

ORACLE_HOME and other parameters are set in .profile:

$ echo $ORACLE_HOME

/u01/app/oracle/product/10.1.0/db_1

$ echo $PATH

/u01/app/oracle/product/10.1.0/db_1/bin:/usr/bin  

What can be the possible issue?  

Thanks

--Harvinder  

--
http://www.freelists.org/webpage/oracle-l