MATLAB: Dynamic mask dialogues – change parameters of more than one subsystem

callbacksconfigurable subsystemdynamic maskmasksimulink

Hello everybody,
I'm currently using callbacks in parameter masks to switch block choice for configurable Subsystems. So I have a system tree like
parent
 - Isolierung (configurable subsystem)
   - Bypass (Option 1)
   - Schichtteil (Option 2)
 - Isolierung1 (configurable subsystem)
  - Bypass (Option 1)
  - Schichtteil (Option 2)
etc.
When I use a parameter 'iso', it Looks (and works) like this for one subsystem:
 switch (get_param(gcb,'iso'))
    case 'mit Isolierung'
        set_param([gcb '/Isolierung'], 'BlockChoice', 'Schichtteil')
    case 'ohne Isolierung'
        set_param([gcb '/Isolierung'], 'BlockChoice', 'Bypass')
end
'iso' is Dropdown…
When I try to change more than one system, I get errors:
switch (get_param(gcb,'iso'))
  case 'mit Isolierung'
      set_param([gcb '/Isolierung'], 'BlockChoice', 'Schichtteil')
      set_param([gcb '/Isolierung1'], 'BlockChoice', 'Schichtteil')
  case 'ohne Isolierung'
      set_param([gcb '/Isolierung'], 'BlockChoice', 'Bypass')
      set_param([gcb '/Isolierung1'], 'BlockChoice', 'Bypass')
end
Error:Error invoking object method –> Error in Rohr_mit_Wand/Rohr NTU5: Initialization commands cannot be evaluated. –>Invalid Simulink object name: Rohr_mit_Wand/Rohr NTU5/Isolierung/Schichtteil/Isolierung1
Any help from anybody? http://blogs.mathworks.com/seth/2008/08/13/dynamic-mask-dialogs/
Update: I investigated further:
>> gcb
ans =
comp_smscp/Rohre_Ventile/Rohr NTU5
>> get_param([gcb '/Isolierung3'], 'BlockChoice')
ans =
Bypass
>> gcb
ans =
comp_smscp/Rohre_Ventile/Rohr NTU5
>> set_param([gcb '/Isolierung3'], 'BlockChoice', 'Schichtteil')
>> gcb
ans =
comp_smscp/Rohre_Ventile/Rohr NTU5/Isolierung3/Schichtteil
So with every set_param, gcb changes its path. How can I step back to the previous path or set multiple subsystem parameters at once?

Best Answer

Ok, found the answer and the trick is quite simple: thinking ;)
What about using a variable to save the first correct block path given by "gcb"? Nevertheless I wonder why
set_param([gcb '/xxx'], 'yyy')
changes the path to "current block/xxx".
My solution looks like the following now:
path = gcb
switch (get_param(gcb,'iso'))
  case 'mit Isolierung'
      set_param([path '/Isolierung'], 'BlockChoice', 'Schichtteil')
      set_param([path '/Isolierung1'], 'BlockChoice', 'Schichtteil')
      set_param([path '/Isolierung2'], 'BlockChoice', 'Schichtteil')
      set_param([path '/Isolierung3'], 'BlockChoice', 'Schichtteil')
      set_param([path '/Isolierung4'], 'BlockChoice', 'Schichtteil')
  case 'ohne Isolierung'
      set_param([path '/Isolierung'], 'BlockChoice', 'Bypass')
      set_param([path '/Isolierung1'], 'BlockChoice', 'Bypass')
      set_param([path '/Isolierung2'], 'BlockChoice', 'Bypass')
      set_param([path '/Isolierung3'], 'BlockChoice', 'Bypass')
      set_param([path '/Isolierung4'], 'BlockChoice', 'Bypass')
end
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