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Actually, doing *yum install fontconfig* fixed it. (Leaving this up instead of deleting the question in case anyone had this problem.)
We have Mathematica 10.3.1 for Linux x86 (64-bit) installed on a machine running Fedora 17 Linux. We are being asked to upgrade to Fedora 27. Will our version of Mathematica continue to work? If not, what is the newest version of Fedora that will...
Thanks, Ilian. You hit the nail on the head! n[23]:= FullForm[wHexToDec["3FFBB67AE8584CAA"]] Out[23]//FullForm= "+ 2^(0) + 2^(-1) + 2^(-3) + 2^(-4) + 2^(-5) + 2^(-7) +\ > 2^(-8) + 2^(-10) +...