[OS X TeX] MakeIndex and periods in file names

[Uwe Schmock]

Dear all,

the file name "Script2014.04.15.tex" works fine with TeXShop and 
BibTeX, but calling MakeIndex generates the message

Input index file Script2014.04.15 not found.
Usage: makeindex [-ilqrcgLT] [-s sty] [-o ind] [-t log] [-p num] 
[idx0 idx1 ...]

on the console window. Of course, I can remove the periods in the 
file name, but maybe there is an expert around who can adjust 
MakeIndex to accept the such a file name.

Happy TeXing,

Uwe