---
title: "Data import in Collect fails (CEP bad signature)"
url: "https://openforis.support/questions/3404/data-import-in-collect-fails-cep-bad-signature"
tags: ["collect"]
status: "answered"
score: 0
answer_count: 1
asked: "2022-06-02T15:55:50"
last_activity: "2024-02-20T12:04:14"
source: "Open Foris Support - Q&A Forum"
license: "Copyright Open Foris, 2026. Some rights reserved under creative commons license."
---

# Data import in Collect fails (CEP bad signature)

Asked by Fehrmann on 2022-06-02

Hi Support,
I just like to report about an error I just encountered while trying to import a quite large .collect-data file into another instance of Collect. My survey has >1300 plots, each with a single foto of ~3MB, which makes the .collect-data archive > 4.4 GB. 
Importing this file leads to a Java error (CEP error "bad signature"). My first assumption was that the survey is not matching, but it seems to be a problem with file size. Exporting the data without fotos (~6MB) and importing is working fine.
Lutz


## Answer (score 0, by Fehrmann on 2024-02-20)

Link: https://openforis.support/questions/3404/data-import-in-collect-fails-cep-bad-signature/3899

We finally solved this problem by excluding the images from the export and downloaded them manually from the tablets.