All steps i´ve done:
Export to another Server - OK
Update RC6 - RC7          - OK
Update RC7 - 1.0.0        - OK
Update 1.0.0 - 1.0.3-1   - FAILED
I have the same promlem.
Update from 1.0.0stable -> 1.0.3-1
Debug output:
Code:
Rebuilding all GUI configuration files
 DEBUG: push_el() sub_name: rebuild_gui_cfg(), msg: Starting...
         ispCP GUI BIND configuration:DEBUG: push_el() sub_name: setup_gui_named(), msg: Starting...
DEBUG: push_el() sub_name: setup_gui_named_cfg_data(), msg: Starting...
DEBUG: push_el() sub_name: setup_gui_named_cfg_data(), msg: FATAL: Undefined Input Data...
DEBUG: push_el() sub_name: exit_msg(), msg: Starting...
[failed]
        FATAL: An error was occured during update process!
        Correct it and re-run this program.
        You can find help at http://isp-control.net/forum
DEBUG: push_el() sub_name: exit_msg(), msg: Ending...
 
I have no idea what to do. 
 
Greets
FISA4