Dear all, I was running Koha 3.00.02 on Ubuntu 9.04 (Jaunty) for the last several months. Yesterday I upgraded the system to ubuntu 9.10. But Koha 3.00.03 was running properly. Today I upgraded from 3.00.02 to 3.00.04. Upgradation went on successfully. but when i tried to access koha, both interface reported the same error --- ------------------------------------------------------------------------------ The following fatal error has occurred: Can't locate YAML.pm in @INC (@INC contains: /usr/share/koha/lib /etc/perl /usr/local/lib/perl/5.10.0 /usr/local/share/perl/5.10.0 /usr/lib/perl5 /usr/share/perl5 /usr/lib/perl/5.10 /usr/share/perl/5.10 /usr/local/lib/site_perl .) at /usr/share/koha/lib/C4/Search.pm line 31. BEGIN failed--compilation aborted at /usr/share/koha/lib/C4/Search.pm line 31. Compilation failed in require at /usr/share/koha/lib/C4/Heading.pm line 25. BEGIN failed--compilation aborted at /usr/share/koha/lib/C4/Heading.pm line 25. Compilation failed in require at /usr/share/koha/lib/C4/Biblio.pm line 36. Compilation failed in require at /usr/share/koha/lib/C4/Reserves.pm line 26. BEGIN failed--compilation aborted at /usr/share/koha/lib/C4/Reserves.pm line 26. Compilation failed in require at /usr/share/koha/lib/C4/Circulation.pm line 25. BEGIN failed--compilation aborted at /usr/share/koha/lib/C4/Circulation.pm line 25. Compilation failed in require at /usr/share/koha/lib/C4/Overdues.pm line 24. BEGIN failed--compilation aborted at /usr/share/koha/lib/C4/Overdues.pm line 24. Compilation failed in require at /usr/share/koha/lib/C4/Members.pm line 27. BEGIN failed--compilation aborted at /usr/share/koha/lib/C4/Members.pm line 27. Compilation failed in require at /usr/share/koha/lib/C4/Auth.pm line 27. BEGIN failed--compilation aborted at /usr/share/koha/lib/C4/Auth.pm line 27. Compilation failed in require at /usr/share/koha/intranet/cgi-bin/mainpage.pl line 23. BEGIN failed--compilation aborted at /usr/share/koha/intranet/cgi-bin/mainpage.pl line 23. Apache Server version: Apache/2.2.12 (Ubuntu) Server built: Aug 18 2009 13:02:37 Koha 3.00.04.019 Koha DB 3.0002012 MySQL mysql Ver 14.14 Distrib 5.1.37, for debian-linux-gnu (i486) using EditLine wrapper OS Linux libra2 2.6.31-14-generic #48-Ubuntu SMP Fri Oct 16 14:04:26 UTC 2009 i686 Perl 5.010000 ------------------------------------------------------------------------------- What to do? Should I go for re installation of PERL modules? Parthasarathi Mukhopadhyay Department of Library and Information Science University of Burdwan, Burdwan, Rajbati - 713104, WB -- _______________________________________________ Search for products and services at: http://search.mail.com