[tex-live] mktextmf crashes on windows during tfm creation

[Akira Kakuto]

Dear Ulrike,

> The reason is that my TEXMF was to long. I have a lot of texmf trees

Thanks a lot. My mktex* tools are very old and I found that
I limited the number of trees to be 16.
In the update phase of TeX Live 2015, I'll fix the problem
by increasing MAXTREES.

Thanks,
Akira