---
title: "Troubleshoot data issues"
slug: "clouddatabox-troubleshoot-data"
updated: 2026-09-17T09:18:20Z
published: 2026-09-17T09:18:20Z
canonical: "guide.ncloud-docs.com/clouddatabox-troubleshoot-data"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://guide.ncloud-docs.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Troubleshoot data issues

Available in VPC

You might run into the following problems when using Cloud Data Box. Find out causes and possible solutions.

## Cannot view data from HUE

I cannot view data from HUE.

#### Cause

A Hive table has not been created.

#### Solution

You can view data by creating a Hive table using the provided sample data. For more information including running scripts, see [View sample data](/docs/en/clouddatabox-sample).

## Data aggregation delay in Jupyter Notebook

It takes a long time to aggregate data in Jupyter Notebook.

#### Cause

The NAVER data capacity provided by NAVER Cloud Platform is 10 TB without a subscription and 50 TB with a subscription. Data aggregation may take longer depending on the data size.

#### Solution

We recommend you to aggregate data in Hue, Zeppelin, or Hive CLI.

## Export in JSON format

The available file formats I can select when requesting a file export in Data Box are table, image, code, model, and license only. I want to export it as a simple JSON file.

#### Cause

JSON files cannot be exported.

#### Solution

Try to export it as a table file in CSV format or as an image or code file.

## Rejected export request

The file export request has been rejected for the reason of "The table configuration is not correct." The file export request has been rejected when there is no problem in the data.

#### Cause

File export requests can be rejected in the following cases:

- There is a table structure error in the file.
- Data with various table structures exist.
- The number of fields in the file differs.

#### Solution

- Each file must contain data with only one table structure. Verify that a single file does not contain data from multiple tables, and correct the table structure if necessary.
- Check whether the number of fields is consistent across all rows in the table.

              Note

              

If you're still having trouble finding what you need, click on the feedback icon and send us your thoughts and requests. We'll use your feedback to improve this guide.