SQL Express 2008 R2 - ConfigurationFile.ini /THE syntax error

When installing SQL Express 2008 R2 from an answer file which was generated from a successful install.  I get the following error message in the install log

The syntax of argument "/THE" is incorrect. Either the delimiter '=' is missing or there is one or more space characters before the delimiter '='. Please use /? to check usage.

Has anyone else come across this before?

Thanks