---
title: "unsupported value type of class org.openforis.idm.model.FileAttribute"
url: "https://openforis.support/questions/4005/unsupported-value-type-of-class-orgopenforisidmmodelfileattribute"
tags: ["collectmobile"]
status: "answered"
score: 0
answer_count: 1
asked: "2024-06-18T14:35:38"
last_activity: "2024-06-18T14:41:14"
source: "Open Foris Support - Q&A Forum"
license: "Copyright Open Foris, 2026. Some rights reserved under creative commons license."
---

# unsupported value type of class org.openforis.idm.model.FileAttribute

Asked by JohannesLarson on 2024-06-18

For my  published survey I get this error in the tablets

unsupported value type of class org.openforis.idm.model.FileAttribute

This occurs when I try to open filled in plots in the survey

Best regards
JL


## Answer (score 0, by Stefano (OF) on 2024-06-18)

Link: https://openforis.support/questions/4005/unsupported-value-type-of-class-orgopenforisidmmodelfileattribute/4006

Dear user,  
If the file attribute in your survey is marked as multiple, then it won't be supported by Collect Mobile; you will have to "wrap" it inside a multiple entity if you need to add more files. In that case, you can also take advantage of the wrapping entity by adding some more attributes, like a file description, remarks, etc.   
Many thanks,  
Open Foris Team