I am installing 11.2.0.1 Enterprise Edition on AIX 5.3. This is an upgrade to 10.2.0.4 and I am going to run the two instances side-by-side before we upgrade production. (My organization doesn't believe in buying separate servers for dev, qa, and production for small applications.) Since the product and oraInventory directories are in the oracle user's $HOME, I set ORACLE_BASE to that location. Now I get this message. MOS has no detailed explanation other than to tell me to set ORACLE_BASE to something else. What is going on? Thanks, Peter Schauss -- //www.freelists.org/webpage/oracle-l