I am using Conan package manager on Windows to create a package. The conan command to create the package copies files to a folder within `%USERPROFILE%\.conan` (or `C:\Users\xxxxxxx\.conan`). Then from this location it builds a Visual Studio project and ultimately calls `doxygen.exe` to create a .chm help file in a post-build command. The doxygen command fails with:

> 
> error : failed to run html help compiler on index.hhp
> 
> 
> 

Further investigation reveals the hhc.exe command executed by doxygen is failing with:

```
C:\Users\xxxxxxx\.conan\data\Module\1.0.0\user\channel\build\524dc97e4a3dd1f774ea3897f9e4faf26c5457d2\Documentation>"C:/Program Files (x86)/HTML Help Workshop/hhc.exe" html\index.hhp

```

> 
> HHC5010: Error: Cannot open "C:\Users\xxxxxxx\data\Module\1.0.0\user\channel\build\524dc97e4a3dd1f774ea3897f9e4faf26c5457d2\Documentation\html\Module.chm". Compilation stopped.
> 
> 
> 

Close inspection reveals that in the error message, the ***".conan" folder is missing***. Sure enough, I confirmed that hhc.exe fails when the index.hpp resides in a folder that has a parent folder that starts with a ".".

Attempts to resolve this:

* changing the Doxyfile setting **OUTPUT\_DIRECTORY** to "$(TMP)/DoxygenModule" resolves the error, but creates the .chm file in another location, which I do not prefer.
* navigating to the 8DOT3 name of the ".conan" folder, which is "CONAN~1", to run the hhc.exe command, succeeds, but unfortunately I have no way of getting conan to use this 8DOT3 path for creating the package. E.g. `C:\Users\xxxxxxx\CONAN~1\...`

I can live with the using the %TMP% folder but would prefer generating the .chm in the current folder. Anyone have any ideas?

HTML Help Workshop v1.31 is installed on my machine at `C:\Program Files (x86)\HTML Help Workshop`, probably from a Visual Studio installation (not sure). I attempted using a version downloaded from Microsoft website (v1.30) as well, which made no difference.

Other info: Conan version 1.18.0, Doxygen version 1.8.14, Windows 10 Version 1809