Installing a RAC in windows I get the next error when executed the emctl command;
Environment variable ORACLE_UNQNAME not defined. Please set ORACLE_UNQNAME to database unique name.
This a typical error, the problem is not configure the ORACLE_UNQNAME like enviroment variable. You can get the name of database from sqlplus command.
SELECT name, db_unique_name FROM V$DATABASE
After that, you must set it (in this case is a Windows box) like this;
HTH – Antonio NAVARRO