Error : ERR_* = . ..                             Do with Alarm
                                                  - StepByStep (
- StepByStep (                                                   ú
               ú                                                 ú
               ú                                                 ú
               ú                                               )
             )                 Ä                + Ec, Error <>
+ Ec Error <>                                      Log Error; Handle Ec
  Log Error; Handle Ec                           ;
  ^/Error = Ec
;                                                If Alarm then
                                                  ...
If !Error then                                   Else
 ...                                              ...
Else                                             ;
 ...
;
