ORACLE_MIDDLEWARE_HOME_LOCATION

 "ORACLE_MIDDLEWARE_HOME_LOCATION ..specified oracle middleware home is not installed in this host"

                    During 11g grid control Installation, I has to changed my Linux hostname after weblogic  server 10.3.2 installation, then at time of grid control installation, I got error message mentioned above.

                    Upon detailed investigation I foud that Once the hostname is changed after weblogic installed correctly then I required to check the registry.xml file for the hostname parameter and update it as per the new hostname.

registry.xml File path is:
/u01/app/oracle/Middleware/registry.xml 

Locate entry 

<host home = 
and ensure that it has the correct hostname.

Cheers,

Farrukh Salman.