I have been working on a Linux 64bit cluster for months, and this morning it seems as if the Switch module for Perl has disappeared from the system.

If I do a find on the place where I expect it to be, I get:

find /opt/thirdparty/perl/ -name Switch.pm

perl --version

This is perl 5, version 14, subversion 2 (v5.14.2) built for x86_64-linux

perldoc POSIX
perl v5.14.2                      2012-06-26                          POSIX(1)

perldoc Switch
No documentation found for "Switch".

Any ideas? Am I confusing CGI::Switch with Switch?


Switch has been indeed removed from the core Perl distribution at version 5.14.0 ( was the cluster just upgraded ? )

While actually using the Switch modules is not recommended, (but I can't find the non-recommendation now) you can get it installed either from CPAN and probably your Linux distribution also provides it as a separate package. It is probably just and apt-get install or yum install away from you.

  • related question: how do I change my code so that it successfully runs on older versions of the Perl interpreter as well as newer ones in my cluster? thanks – 719016 Sep 17 '14 at 8:24
  • 1
    Either you make sure Switch is installed on the newer version, or you stop using switch and use plain if/elsif/else constructs. – szabgab Sep 17 '14 at 9:02

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