RC3 -> RC4 ... Unable to upgrade

[Whoa]

I am trying to upgrade from RC3 to RC4 using the upgrade guide in the documentation section. (Debian Etch)

I got the following error -

Code:

host:/var/www/ispcp/engine/setup# ./ispcp-update

        Welcome to ispCP '1.0.0 RC3 OMEGA' Update Dialog.
        This program will update your VHCS / ispCP OMEGA system on your server.
        Please make sure you have a backup of your server data.

        NOTE: During the migration process some or all services might require to be
        shut down or restarted.

        Please select from which version you want to update:
        (1) VHCS 2.4.7 or VHCS 2.4.7.1
        (2) VHCS 2.4.8 RC1
        (3) ispCP OMEGA 1.0.0 RC2 (incl. b and c)
        (4) ispCP OMEAG 1.0.0 RC3
        (0) abort
        Your selection: 4
        Stopping ispCP GUI-Backend communication Daemon: ispcp_daemon.
        Stopping ispCP Network Traffic Logger: ispcp_network
* ispcp_network is already stopped
.
        Upgrading system values ...     done
        Upgrading database structure...Use of uninitialized value in string eq at /var/www/ispcp/engine/setup/../ispcp_common_methods.pl line 515.
Use of uninitialized value in concatenation (.) or string at /var/www/ispcp/engine/setup/../ispcp_common_methods.pl line 516.
Use of uninitialized value in concatenation (.) or string at /var/www/ispcp/engine/setup/../ispcp_common_methods.pl line 516.
         Update failed!
        ispCP Update failed.
host:/var/www/ispcp/engine/setup#

Any help greatly appreciated.