Set variable minimum year

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5 years 6 months ago #88144 by autopoiesis
autopoiesis created the topic: Set variable minimum year
I would like to set for a date/time question with the format yyyy (Date_2) a minimum year based on the answer of another date/time question (Date_1, also yyyy).
I already tried to enter in the minimum year field of Date_2:
{Date_1.NAOK}

and
{substr(Date_1.NAOK,0,4)}

but both expressions don't work.

Is there a way to make this work?

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