I created a survey to calculate BMI.
If I run the survey inside Limesurvey it works fine.

If I run the survey outside I get an error, Nan, after the values are introduced.

The first time I run the survey everything works fine. If I refresh the page I get NAN error after I introduce values

I teste in Chrome and Edge.

WHy do I get those NAN errors?

I attached the survey

PLEASE, do not double post.

Always keep in mind: We all are volunteers who do this work in our spare time.
So, please, do not expect an answer within 15 hours (in your case) on weekends.

No reason to repeat the questiomn.

Joffm

Sorry about that.
I know you are volunteers.
I have a deadline and I don't how to solve this.
Looks a problem of javascript.
Even the example provided in www.limesurvey.org/manual/ExpressionScri...eatures_Demonstrated has problems.