2. What steps can we take to reproduce this issue?
3. What have you tried to fix the issue?
Hello ODK Community,
I am making my first ever survey on ODK. I keep getting the message below but can not see the error. I have seen a few posts with similar themes but can't see what is wrong with mine as it is a simple yn. I think I am missing the obvious. My eyes will get better at spotting the errors with time!
4. Upload any test forms, screenshots, or logs below.
[Error: There has been a problem trying to replace ${yn} with the XPath to the survey element named 'yn'. There is no survey element with this name.](https://Error: There has been a problem trying to replace ${yn} with the XPath to the survey element named 'yn'. There is no survey element with this name.)
In your form 'yn' refers to a choice list (for 'yes' vs 'no')
But you appear to be referencing the choice list in your relevant (XPath) expressions, whereas the things you reference in relevant/constraint/calculations need to refer to the actual form's select question, not the choice list that the select question happens to use... To be precise, this is probably the culprit:
Instead of relevant: selected(${yn},'2') I think you probably want to check whether the question ${MBW_school_timetable} includes 'n' as the response; ie
relevant = selected(${MBW_school_timetable},'2')
Aside: since MBW_school_timetable is a select_one - as opposed to a select_multiple - using a selected(...) check is kinda overkill, since it'll only ever have a single response. That is, you can probably get away with a simpler:
relevant: ${MBW_school_timetable} = '2'
[BTW, you are doing the above in a bunch of places in your form - not just with MBW_school_timetable - so I'd probably suggest going thru the entire form and making the correction.]
