There is no way that i can install the AI::FANN 0.0.7. I tried to install it from the cpan interface, and from the sources... I have the libfann 2 And the only version of AI::FANN that i can install is the 0.0.5 The AI:FANN 0.0.7 never pass the make test... this is my output: LD_RUN_PATH="" cc -shared -L/usr/local/lib FANN.o morefann.o -o blib/arch/auto/AI/FANN/FANN.so -ldoublefann chmod 755 blib/arch/auto/AI/FANN/FANN.so cp FANN.bs blib/arch/auto/AI/FANN/FANN.bs chmod 644 blib/arch/auto/AI/FANN/FANN.bs Manifying blib/man3/AI::FANN.3pm /usr/bin/make -- OK Running make test PERL_DL_NONLAZY=1 /usr/bin/perl "-MExtUtils::Command::MM" "-e" "test_harness(0, 'blib/lib', 'blib/arch')" t/*.t t/AI-FANN.... # Failed test 'use AI::FANN;' # at t/AI-FANN.t line 9. # Tried to use 'AI::FANN'. # Error: Can't load '/home/purrutia/.cpan/build/AI-FANN-0.07/blib/arch/auto/AI/FANN/FANN.so' for module AI::FANN: /home/purrutia/.cpan/build/AI-FANN-0.07/blib/arch/auto/AI/FANN/FANN.so: undefined symbol: fann_get_activation_function at /usr/lib/perl/5.8/DynaLoader.pm line 225. # at (eval 3) line 2 # Compilation failed in require at (eval 3) line 2. # BEGIN failed--compilation aborted at t/AI-FANN.t line 9. # Looks like you failed 1 test of 1. t/AI-FANN....dubious Test returned status 1 (wstat 256, 0x100) DIED. FAILED test 1 Failed 1/1 tests, 0.00% okay t/pods.......skipped all skipped: Only the author needs to check that POD docs are right Failed Test Stat Wstat Total Fail List of Failed ------------------------------------------------------------------------------- t/AI-FANN.t 1 256 1 1 1 1 test skipped. Failed 1/2 test scripts. 1/1 subtests failed. Files=2, Tests=1, 0 wallclock secs ( 0.07 cusr + 0.02 csys = 0.09 CPU) Failed 1/2 test programs. 1/1 subtests failed. make: *** [test_dynamic] Error 255 /usr/bin/make test -- NOT OK Running make install make test had returned bad status, won't install without force Failed during this command: SALVA/AI-FANN-0.07.tar.gz : make_test NO Any clues about how to install it ( i use ubuntu dapper) Thanks