else if ( dict_lookup_var (cmd->dict, name) != NULL )
msg (SE, _("Variable %s already exists."), name);
else if (string_set_contains (new_names, name))
else if ( dict_lookup_var (cmd->dict, name) != NULL )
msg (SE, _("Variable %s already exists."), name);
else if (string_set_contains (new_names, name))