Warning: prerequisite Math::Calculus::Expression 0.2 not found at /home/cpanrun/ia64-lp64/build/5.6.1/lib/5.6.1/ExtUtils/MakeMaker.pm line 343. Checking if your kit is complete... Looks good Writing Makefile for Math::Calculus::TaylorSeries cp TaylorSeries.pm blib/lib/Math/Calculus/TaylorSeries.pm Manifying blib/man3/Math::Calculus::TaylorSeries.3 PERL_DL_NONLAZY=1 /home/cpanrun/ia64-lp64/build/5.6.1/bin/perl -Iblib/arch -Iblib/lib -I/home/cpanrun/ia64-lp64/build/5.6.1/lib/5.6.1/IA64.ARCHREV_0-thread-multi-64all -I/home/cpanrun/ia64-lp64/build/5.6.1/lib/5.6.1 test.pl 1..6 ok 1 ok 2 ok 3 Can't locate object method "differentiate" via package "Math::Calculus::Expression" (perhaps you forgot to load "Math::Calculus::Expression"?) at blib/lib/Math/Calculus/TaylorSeries.pm line 149. make: *** [test_dynamic] Error 255