# OCR Diagnostic Logs

> The UiPath.Vision.Host Diagnostic logs enable you to collect information regarding OCR engine errors.

The UiPath.Vision.Host Diagnostic logs enable you to collect information regarding OCR engine errors.

## Enabling UiPath.Vision.Host Diagnostic Logs

To collect information regarding OCR errors, you can enable the generation of the diagnostic log files by adding the following lines to the `<Installation Folder>\NLog.config` file:

`<target xsi:type="File" name="visionHostFile" fileName="${LogDirectory}/${shortdate}_VisionHost.log" layout="${time} ${level} ${message}" concurrentWrites="true" />`

`<logger name="UiPath.Vision.Host.exe" minLevel="Trace" writeTo="visionHostFile" final="true" />`

:::note
Editing the `NLog.config` file requires administrator permissions.
:::

## Targets of the UiPath.Vision.Host Diagnostic Logs

The log files are generated at the path specified in the `<Installation Folder>\NLog.config`, under the `visionHostFile` parameter. The default value is `%localappdata%\UiPath\Logs\${shortdate}_VisionHost.log`.

:::note
Editing the `NLog.config` file requires administrator permissions.
:::