The debugging messages (the suffix is "Debug" or the level is 0), on the last versions of OpenSCADA, will be allowed to observe only after the debugging enabled: the field "Least level" set to "Debug (0)" (Fig. 8) and check category(es) of the messages (Fig. 9), for the details read here! The debugging messages enabling and disabling allows you to include the debug messages permanently into the procedures with the proper category of the place. All other, not debug, messages will show anytime, for levels more or equal to the globally set (Fig. 8).