SQL Server 2012 command line install problem Windows 7 64;MEDIALAYOUT

Having problems installing automated SQLServer Express 2012 on Win 7 64 bit, using a config file ,after extracting , I run setup.exe ConfigFile.ini

This error occurs :The specified value for setting MEDIALAYOUT is invalid
The expected values are
None Core Advanced Full

But there is no such config item , MEDIALAYOUT, in the properties of the configFile
,and no such item is in the specs. Have also tried calling setup.exe from the command  line but am stuck at this message.  Any suggestion appreciated