Error in eCATT execution

Hi techies,

I have actually migrated CATT into eCATT. This has created Test scripts and Test configuration in eCATT.

When I migrate CATT into Test scripts it migrates all variable also and replace & with '_'.

I exported these variables from Test configuration into .TXT file and have filled with data.

When I try to execute 'test configuration' using this file by selecting Exernal variant it gives me error that ' Variants that Match Selection Cannot Be Found'.

Can anybody help me in analysing this error? and how to resolve it.

Thanks,

Bharati