Comment 1 for bug 1196313

I have just run into the same problem here - using Xubuntu 14.04 with the provided GCstar package (version 1.7.0).

The problem seems to be some leftover code in /usr/share/gcstar/lib/GCExport/GCExportHTML.pm - look for the function 'wantsFieldsSelection':

    sub wantsFieldsSelection
    {
        my $self = shift;
        return 1;
        return $self->{genericAdded} || $self->{genericModels};
    }

In the current version it will always return '1' and thus make field selection mandatory for exporting - which IMHO is not needed for HTML export. Commenting the line with 'return 1;' - i.e. prepending it with a hash ('#') or removing it fixes the issue for me (GCstar needs to be restarted after the change if it was running).

Seems to be the same, as the problem mentioned in this post in the GCStar forums:
http://forums.gcstar.org/viewtopic.php?id=3462

Maybe someone could push this upstream or notify the devs...