# How to use adduvf.exe

**URL:** <https://discourse.radiance-online.org/t/how-to-use-adduvf-exe/5054>\
**Category:** Uncategorized\
**Created:** [December 13, 2019, 11:21am UTC](https://discourse.radiance-online.org/t/how-to-use-adduvf-exe/5054 "2019-12-13T11:21:42Z")\
**Posts on this page:** 1\
**Showing post:** 6

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**Author:** ![rafael.alonso](https://discourse.radiance-online.org/letter_avatar_proxy/v4/letter/r/ba8739/32.png) [@rafael.alonso](https://discourse.radiance-online.org/u/rafael.alonso)\
**Post date:** [January 17, 2020, 4:28pm UTC](https://discourse.radiance-online.org/t/how-to-use-adduvf-exe/5054/6 "2020-01-17T16:28:25Z")

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Unfortunately, it gets stuck on a “bad vertex count for surface” and "bad subsurface “Window1"” errors:

 ![image](https://discourse.radiance-online.org/uploads/default/original/1X/de33acd3d2d7f49f1f5c70df13f90b2a1c94539c.png)

When I look into the .idf everything seems ok.

Would you know why this happens?

[IDF file](https://drive.google.com/file/d/1WFc8_B-GTJ6v7f2cpRCa0YkvtUZr-lsg/view?usp=sharing)

PS. for future reference, I added “C:\Radiance\bin” to the system variables following this [https://docs.alfresco.com/4.2/tasks/fot-addpath.html](https://docs.alfresco.com/4.2/tasks/fot-addpath.html) (it was done for an older version of windows and not all the setting names are exactly accurate, but it´s quite helpful).

Sorry for the double-posting, as a new user I could only upload one image 😅

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