why

[Intelligent-Monster]

librealsense	2.56.3 RELEASE
OS	Windows

Intel RealSense Viewer / Depth Quality Tool has crashed with the following error message:

RealSense error calling rs2_create_context_ex(api_version:25603, json_settings:{):
    failed to convert special folder: errno=42

[MartyG-RealSense]

Hi @Intelligent-Monster The errno=42 error can occur if the user's Windows account name has special characters in it, such as those in Chinese or Hebrew language.

A fix for this issue has recently been merged into the development branch of the librealsense SDK - please see #13597

The development branch can be found here:

https://github.com/IntelRealSense/librealsense/tree/development

My Intel RealSense colleagues provide the following advice if it is not possible for you to build librealsense from source code on the development branch.

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You can try to run it as Administrator. On Windows 11, it also has a feature to run the app as a different user. That option can be enabled with the instructions at the link below:

https://winaero.com/how-to-run-apps-as-different-user-in-windows-11/

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Another option would be to wait for the next version of librealsense, which should include the fix.