Dear all, We have koha-17.05.06, installed using tarball method. I have followed the following methods for upgrading from koha-17.05.06 to koha-latest 1. Updated koha-list source accordingly koha-stable 2. Update all perl dependencies and cpan module vijay@debian:/usr/share/koha-18.11.04$ perl Makefile.PL /usr/share/koha-17.05.06/misc/koha-install-log /usr/share/koha/misc/koha-install-log and also vijay@debian:/usr/share/koha-18.11.04$ sudo perl Makefile.PL /usr/share/koha-17.05.06/misc/koha-install-log /usr/share/koha-18.11.04/misc/koha-install-log vijay@debian:/usr/share/koha-18.11.04$ sudo make vijay@debian:/usr/share/koha-18.11.04$ sudo make upgrade ------------------------------------------------------------------------------------ Getting the following error during upgrade Kindly suggest the proper method for up-gradation of koha-latest With regards, Vijay Kumar ::::error:::: vijay@debian:/usr/share/koha-18.11.04$ sudo make upgrade Can't locate C4/Installer/UpgradeBackup.pm in @INC (you may need to install the C4::Installer::UpgradeBackup module) (@INC contains: /etc/perl /usr/local/lib/x86_64-linux-gnu/perl/5.24.1 /usr/local/share/perl/5.24.1 /usr/lib/x86_64-linux-gnu/perl5/5.24 /usr/share/perl5 /usr/lib/x86_64-linux-gnu/perl/5.24 /usr/share/perl/5.24 /usr/local/lib/site_perl /usr/lib/x86_64-linux-gnu/perl-base). BEGIN failed--compilation aborted. Makefile:22908: recipe for target 'make_upgrade_backup' failed make: *** [make_upgrade_backup] Error 2