[Koha] koha-3.12.00-alpha Software error

[Peter Zhao]

Hi,
   I upgraded Koha-3.10 to koha-3.12. But opac can't search and show the following errors. Could anyone know how to fix the following problem? Thanks a lot.


Software error:
Base class package "OpenILS::QueryParser" is empty.
    (Perhaps you need to 'use' the module which defines that package first,
    or make that module available in @INC (@INC contains: /usr/share/koha/lib /etc/perl /usr/local/lib/perl/5.14.2 /usr/local/share/perl/5.14.2 /usr/lib/perl5 /usr/share/perl5 /usr/lib/perl/5.14 /usr/share/perl/5.14 /usr/local/lib/site_perl .).
 at /usr/share/koha/lib/Koha/QueryParser/Driver/PQF.pm line 2.
BEGIN failed--compilation aborted at /usr/share/koha/lib/Koha/QueryParser/Driver/PQF.pm line 2.


For help, please send mail to the webmaster (webmaster at ubuntu), giving this error message and the time and date of the error.

Software error:
[Mon Mar 18 20:11:45 2013] opac-search.pl: Base class package "OpenILS::QueryParser" is empty.
[Mon Mar 18 20:11:45 2013] opac-search.pl:     (Perhaps you need to 'use' the module which defines that package first,
[Mon Mar 18 20:11:45 2013] opac-search.pl:     or make that module available in @INC (@INC contains: /usr/share/koha/lib /etc/perl /usr/local/lib/perl/5.14.2 /usr/local/share/perl/5.14.2 /usr/lib/perl5 /usr/share/perl5 /usr/lib/perl/5.14 /usr/share/perl/5.14 /usr/local/lib/site_perl .).
[Mon Mar 18 20:11:45 2013] opac-search.pl:  at /usr/share/koha/lib/Koha/QueryParser/Driver/PQF.pm line 2.
[Mon Mar 18 20:11:45 2013] opac-search.pl: BEGIN failed--compilation aborted at /usr/share/koha/lib/Koha/QueryParser/Driver/PQF.pm line 2.
Compilation failed in require at /usr/share/koha/lib/C4/Search.pm line 1225.


For help, please send mail to the webmaster (webmaster at ubuntu), giving this error message and the time and date of the error.