If using custom attributes in the participants table, they are retrieved something like this - {ATTRIBUTE_1}

I think you have to use: {TOKEN:ATTRIBUTE_1}

In my opinion you should use {TOKEN:ATTRIBUTE_1}

And: It is better to generate the end-url in an equation (myEndUrl) before.
In the end-url you only enter {myEndUrl}

Joffm

Oops, yes, I was thinking of in the email templates.

Oops, yes, I was thinking of in the email templates.

These inconsistencies are annoying. Just like equations with and without {}.

I would always use the same code. It is not that much more work to write {TOKEN:ATTRIBUTE_1} than {ATTRIBUTE_1} or add the {} to a relevance equation, so not much gained.

But at least it would be more consistent if this would be the same code over the whole of Limesurvey.