Have just installed Oracle 10.2 on AIX 5. When I run sqlplus as oracle it runs OK. When I run it as another user I get the message below I thought the environment variables were not set, but .profiles are identical in terms of Oracle values Any ideas? 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 John