Hello everybody,

how is it possible to use [date stamp] in the question validation equation?
Do I have to use JavaScript/PHP or is it possible in LimeSurvey with EM?

My problem is:
The same participant must fill out the same survey over several days, with a minimum of 1 day since the last time he filled it out.
Only filled out surveys should be tracked.

I thought it might be possible to make a validation equation like this:

[datestamp] +24 hours le (is the same as < [date]

but it wont work.

Any advice or hint would be appreciated.

Best regards from germany,
Mixer

Maybe a good start here