Question

[Wed Mar 27 22:38:23 2002] [error] [client 127.0.0.1] Premature end of script headers: e:/program_files/twiki/bin/view [Wed Mar 27 22:38:23 2002] [error] [client 127.0.0.1] Can't locate CGI/Carp.pm in @INC (@INC contains: /usr/lib/perl5/5.6.1/cygwin-multi /usr/lib/perl5/5.6.1 /usr/lib/perl5/site_perl/5.6.1/cygwin-multi /usr/lib/perl5/site_perl/5.6.1 /usr/lib/perl5/site_perl) at e:\PROGRA~1\twiki\bin\view line 21.

[Wed Mar 27 22:38:23 2002] [error] [client 127.0.0.1] BEGIN failed--compilation aborted at e:\PROGRA~1\twiki\bin\view line 21. .

It looks like perl is using cygwin path, while apache uses windows path. And that is causing the error. Any help would be appreciated.

-- TWikiGuest - 27 Mar 2002

Answer

It looks like you are missing the CGI::Carp Perl module - this should be built in to Perl (since 5.005_03), according to the module list at ReadmeFirst. You can install this using the cpan command - see the WindowsInstallCookbook for details. Also, please download and run the latest testenv from CookbookActivePerlTestenv, as this provides a lot more information, and checks for the required Perl modules.

The path setup shown is normal, and the INC path used by Perl looks OK, so I don't think that's the problem.

-- RichardDonkin - 28 Mar 2002

I checked my E:\Program_Files\cygwin\lib\perl5\5.6.1\CGI directory. The Carp.pm is present there. Is there any other way in which I can test that the module is installed or not?

-- TWikiGuest - 27 Mar 2002

Yes, just install the testenv mentioned above, it loads this module as part of testing its version.

-- RichardDonkin - 28 Mar 2002

I get the same error even after downloading the new testenv

[Thu Mar 28 18:52:42 2002] [error] [client 127.0.0.1] Premature end of script headers: e:/program_files/twiki/bin/testenv [Thu Mar 28 18:52:42 2002] [error] [client 127.0.0.1] Can't locate CGI.pm in @INC (@INC contains: /usr/lib/perl5/5.6.1/cygwin-multi /usr/lib/perl5/5.6.1 /usr/lib/perl5/site_perl/5.6.1/cygwin-multi /usr/lib/perl5/site_perl/5.6.1 /usr/lib/perl5/site_perl) at e:\PROGRA~1\twiki\bin\testenv line 21.

[Thu Mar 28 18:52:42 2002] [error] [client 127.0.0.1] BEGIN failed--compilation aborted at e:\PROGRA~1\twiki\bin\testenv line 21.

-- TWikiGuest - 28 Mar 2002

This is a different error - the first one was about CGI::Carp, this is about CGI (i.e. CGI.pm). There's something broken about your Perl installation. The best thing IMO is to re-install Perl as follows (see full instructions for Cygwin setup in WindowsInstallCookbook):

1. Launch the Cygwin setup.exe (download from cygwin.com if needed), taking all the default choices
2. Click on the New column entry for the perl-5.6.1 package until it says Uninstall, then go ahead (may upgrade some other packages, so exit any Cygwin shells first)
3. Launch a Cygwin shell and do rm -rf /lib/perl5 (type this very carefully!! It removes an entire file tree all at once...) to clean out any modules not uninstalled
4. Launch Cygwin setup again and install Perl.

There's a bit more about a similar problem at http://www.cygwin.com/ml/cygwin/2001-08/msg01370.html

Hope this helps.

-- RichardDonkin - 28 Mar 2002

Cool that worked. Thanks a lot.

-- TWikiGuest - 28 Mar 2002

Good stuff! While you were testing this, I wrote an enhanced version of testenv that handles systems where the CGI or CGI::Carp modules are missing - it's at CookbookActivePerlTestenv, and also in TWikiAlphaRelease.

Thanks for raising this, testenv is now a lot more robust and should pin this down more quickly in future.

-- RichardDonkin - 29 Mar 2002

This problem happens to me only when I run Apache as a service. Running Apache in Standalone mode, everything works fine. What's the difference? Weird. I'm using Apache 1.3.22 on Windows XP using local system account.

-- JohnWong - 08 Jul 2002

The difference is most likely due to the environment when running as a service. Try running the latest testenv, from CVSget:bin/testenv under (1) Apache as a service and (2) Apache standalone. In particular, check the setting of @INC and that all modules are found OK. There are ways of setting @INC directly, e.g. you can use the Apache SetEnv command as mentioned in WindowsInstallCookbook - check the perl manual pages for details. It may even be that you are picking up a different version of Perl, so compare the two testenv pages carefully.

It would be good to raise a new support question on this topic, including details of your versions of TWiki, Perl, etc - see AskedQuestions. Attaching the two testenv output pages to the new page would be useful.

-- RichardDonkin - 09 Jul 2002