I'm trying to trap entries into our survey that do not pass several parameters that are critical to our survey results -> e.g. if someone goes to our survey URL but has not included these parameters in the URL they will get a 'sorry page' rather than the survey.
I've created a hidden first page with the sorry message (I know, the system doesnt seem to love hidden first pages), and created an advanced show rules along the following lines:
[%%GET_var] == 0, [%%GET_var] == '', [%%GET_var] == NULL etc.
Bottom line, the rule seems to be ignored when ?var= is not passed in the URL. When var is passed, the rules work but it defeats the purpose of the checker. Can anyone help?