---
title: "Built-in field hasn't been mapped."
canonical: "https://support.appfire.com/space/DLP/297766941/Built-in%20field%20hasn't%20been%20mapped."
format: markdown
---
The general field mapping on the host platform (e.g., the Jira instance on which you have installed BigPicture) hasn't been done for a particular field.

The mapping of tasks in a particular Box is irrelevant. The check is performed just for the general mapping of the primary instance. 

**Example**

BigPicture is installed on the "nostromo2" Jira instance. The host platform mapping is:

![image2021-6-14_13-17-17.png](media://a2bfeef5-9d5b-48ce-8c74-43b4dff9f5f0)

The general mapping is on the left:  


![image2021-6-14_13-18-17.png](media://69bf7285-bbab-4845-b376-3a09494814d8)

To avoid the error when sorting by "End date" or "Start date," the following fields have to be mapped:

![image2021-6-14_13-19-29.png](media://33f92c35-f68a-4a0b-9960-0b52487e6e85)

Built-in fields

The mapping has to be done if you want to sort tasks using the built-in field.