German letters like ü,ö,ä in filenames or foldernames

[Matthi]

I can't use the C build snippet if the filename or a folder in the path of the file contains the german letters ö,ü,ä.
How can I chang that?

Matthias

[mbajohr]

From my own experience i never would use anything else than standard ascii characters in file or folder names, even if the OS vendor allows you to use almost any characters.