** Using WeBWorK **

Hi,
defaults.config contains
$pg{directories}{macrosPath} = [
".", # search the problem file's directory
$courseDirs{macros},
$pg{directories}{macros},
"$courseDirs{templates}/Library/macros/Alfred",
"$courseDirs{templates}/Library/macros/BrockPhysics",
"$courseDirs{templates}/Library/macros/CollegeOfIdaho",
"$courseDirs{templates}/Library/macros/Dartmouth",
"$courseDirs{templates}/Library/macros/FortLewis",
"$courseDirs{templates}/Library/macros/Hope",
"$courseDirs{templates}/Library/macros/LaTech",
"$courseDirs{templates}/Library/macros/MC",
"$courseDirs{templates}/Library/macros/Michigan",
"$courseDirs{templates}/Library/macros/Mizzou",
"$courseDirs{templates}/Library/macros/NAU",
"$courseDirs{templates}/Library/macros/PCC",
"$courseDirs{templates}/Library/macros/TCNJ",
"$courseDirs{templates}/Library/macros/UBC",
"$courseDirs{templates}/Library/macros/UMass-Amherst",
"$courseDirs{templates}/Library/macros/UW-Stout",
"$courseDirs{templates}/Library/macros/UniSiegen",
"$courseDirs{templates}/Library/macros/Union",
"$courseDirs{templates}/Library/macros/WHFreeman",
"$courseDirs{templates}/Library/macros/Wiley",
];
and AnswerFormatHelp.pl is under FortLewis. Thus it should be found if you have a standard setup.

Could the macros search path have been modified in your localOverrides.conf? Or (unlikely) could you not be using Library to point to the OPL?