Dynamic mask dialogues - change parameters of more than one subsystem

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?

[Andreas]

Update above... Still no one who could help?

Answer 1

[Andreas]

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