---
schema_version: "1"
id: 107d8d850a026858d78d26c0fadf8f5ae9c1bf78f751665b384e2901593e4f46
title: Troubleshooting
collection: tableau
version: next
locale: en-us
portal_url: https://docs.salesforce.com/tableau/next/en-us/api/vizql-data-service/docs/vds_troubleshooting.md
canonical_url: https://help.tableau.com/v0.0/api/vizql-data-service/en-us/docs/vds_troubleshooting.html
source_site: help.tableau.com
content_type: documentation
content_hash: 6fda74f8481fcf8dca6a7bbc85a879b322a513437dc2af1741c7f44b50518d49
description: Documentation for the VizQL Data Service
---
# Troubleshooting

  

🕐 _2 min read_

- Make sure your URL is correct by hitting the `simple-request` endpoint. If you see “ahoy” returned, you know you can reach the service.
- Turn on the `debug` flag in `options` to get a more detailed error message.
    
    ```
      {
       "datasource": {
         "datasourceLuid": ""
       },
       "options": {
         "debug": true
       }
      }
    ```
- For Tableau Server, examine the log files. For help, see [Tableau Server Logs and Log File Locations](https://help.tableau.com/current/server/en-us/logs_loc.htm).
- To debug log in issues, see [Testing and Troubleshooting REST API Calls](https://help.tableau.com/current/api/rest_api/en-us/REST/rest_api_concepts_testing.htm).
- A common error is the following:
    
    ```
      {"errorCode":"400000",
      "message":"Unable to parse the request 
      body. Please ensure it is formatted as 
      valid JSON. (Illegal unquoted 
      character ((CTRL-CHAR, code 10)): has 
      to be escaped using backslash to be 
      included in string value)."}
    ```
    
    This likely means that you have an extra indentation after your `datasource-luid`. Make sure the data source LUID is a single line.