> For the complete documentation index, see [llms.txt](https://support.iafcertsearch.org/mncb/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://support.iafcertsearch.org/mncb/error-handling/resolve-data-mapping-issues.md).

# Resolve Data Mapping Issues

The Data Mapping issue may appear during the initial data validation process, which always takes place after selecting the files you want to upload **(Step 2 of data import)**.

## To Resolve Data Mapping Issues

1. Click the **'Data Mapping'** from the validation navigation within the data import process:
2. Once clicked, a list of all the fields that are unrecognized by the system is listed in the main content area.

<figure><img src="/files/1uz34400z0eVUf8Nq6Ez" alt=""><figcaption></figcaption></figure>

<table data-header-hidden data-full-width="true"><thead><tr><th width="180"></th><th width="483">Description</th></tr></thead><tbody><tr><td><strong>Field Name</strong></td><td>Field Name where the data error is seen.</td></tr><tr><td><strong>Source</strong></td><td>The actual data value that exists from your source file, that is not recognized by the system.</td></tr><tr><td><strong>Target</strong></td><td>The data value defined in the IAF CertSearch database.</td></tr></tbody></table>

3. Under the Target column, search or select the dataset to which you want to map your source data.

<figure><img src="/files/Rn6iJZDBtjtB1mZZlr5W" alt=""><figcaption></figcaption></figure>

3. Once all data mapping issues are resolved, click the **'Apply Data Mapping'** button to ensure that the mapped data are submitted.
4. Once done, the system will continue validating your data.&#x20;
5. If all data is valid, your data will be successfully imported.<br>

To know more about Data Mapping, read the related articles below:

### Related Topics

> [Global Data Mapping ](/mncb/data-management/data-import/global-mapping.md)