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

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" />

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.