I have the following situation:

- about 20 survey groups, with each a unique reference saved inside a hidden question (GRREF), prefilled by the URL (GET parameter)
- the reference gets checked for validity (VALTEST question)
- if the reference is invalid, all questions are hidden, and the end message should be set to a "Something went wrong" message
- if the reference is valid, questions are shown, and the end message should be set to a "Thank you" message

I have used information found here to set the end message:
[url] forums.limesurvey.org/forum/development/...ditional-end-message [/url]

For some reason that I cannot fathom, the if test that should set the end message fails, and always sets the "Something went wrong" value.
Hereby attached my .lss test file. I'm using Version 5.0.4+210614.

Several problems...

- VALTEST needs to be an equation type question.

- The relevance for BIRDAT should not reference the VALTEST.question variable, it should should reference VALTEST directly:
- There is no IF() statement in ENDMSG. I should be something like:
Sample survey attached: 

Thanks a lot, worked like a charm !

Many wrong assumptions I made..

Could you say when we should reference the ".question" variable, and when we should rather reference the variable directly ?

With equation type questions, you don't need the .question qualifier as equation questions become defined variables in themselves.

- manual.limesurvey.org/Question_type_-_Eq...on#Short_description
- manual.limesurvey.org/ExpressionScript_-...#Access_to_variables

Not sure whether I should start a new topic, but here is my status: the survey you sent back works perfectly fine, but then, when:

- I remove the two debugging questions (SHOWVALTEST and SHOWENDMSG)
- and I choose "Show welcome screen: On" in "Presentation", the survey gets stuck on that welcome screen, only when VALTEST is invalid

why is that ? I noticed you had disabled the welcome screen: is it incompatible in this case ?

That is the expected behaviour. If all questions in the survey are either hidden via question setting or relevance, the survey will not proceed. This is the same in the 3.x LTS version. You will need to add at least one visible question.

tpartner wrote:

the survey will not proceed
 

But when disabling the welcome screen, it does work fine (i.e. jumps to the end message, when VALTEST is invalid) ?

Still not getting all the subtleties, but after replacing the welcome screen with an always visible "Text display" question, it works as expected.

Thanks !