Enketo form load error with instance lookup in choice filter 'Cannot read properties of undefined (reading 'length')

[ahblake]

@LN

This seems to work so there's probably another condition needed.

Yep! I took your example and built it back up to find the error - it's the presence of image that's doing it.

choice filter with instance lookup + image.xlsx (659.8 KB)

If you add an image column to the choice list for benches, the form will no longer load in Enketo, regardless of whether the images have been uploaded or not.

So you can have a choice filter that has an instance lookup OR images against the choices, but not both. If you need both, you must do the instance lookup separately and use that field in the choice filter.

This is related to my other issue with Enketo and choice filtering with images & big-images, but at that time form loaded but labels were blank (it was a combined or choice filter in that example though)

@ahblake

If I store the drawing IDs in three columns DWG1/2/3 on the choices sheet and then choice filter as below with an instance lookup then

• Enketo does filter correctly **but the labels are blank and there is no image.
• Collect filters correctly and labels and images are shown, big-image works

name=instance('item')/root/item[name=${item}]/DWG1 or name=instance('item')/root/item[name=${item}]/DWG2 or name=instance('item')/root/item[name=${item}]/DWG3

Removing the big-image column has no effect on the above behaviour