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

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You are getting below error while trying to connect the Oracle SQL level,

> 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


Set the ORACLE_HOME environment using the command prompt (for Windows operating system). Ensure to set the environment path before the \bin directory.

set ORACLE_HOME=C:\oracle\product\10.2.0\ITsiti

Alternatively, you can set by right click on the My Computer > Advanced > Environment Variables. Click New under System variables. On the New System Variable tab, fill in the Variable name as ORACLE_HOME and Variable value with the location as above. (Below screenshot is the example of maintaining the JAVA_HOME – You can do the same step)

Windows ORACLE_HOME Environment Variable

Once configured, you can check using below command,


Try to log in into SQL level again,


SQL*Plus: Release - Production on Wed Jan 8 17:48:15 2014

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