How do I find all continuous blocks in a model in order to replace them to use a discrete solver?

I would like to see all continuous blocks at once in order to change all continuous blocks to discrete state blocks. When I switched to "Fixed Step discrete (no continuous state)" solver from "Variable Step (auto)", I get the following error:

"FixedStepDiscrete" solver cannot be used to simulate block diagram <model_name> because it contains continuous states. 

Answer 1

[MathWorks Support Team]

You can find out which blocks have continuous states using either of the following two methods: 

1) Use the command "Simulink.BlockDiagram.getInitialState" as follows:

open_system(docpath(fullfile(docroot, 'toolbox','simulink','examples','ex_execution_order')))
model = gcs;
states = Simulink.BlockDiagram.getInitialState(model);

if ~isempty(states)
    
    for n=1:length(states.signals)
        
        if strcmp(states.signals(n).label,'CSTATE')
            
            states.signals(n).blockName
            
        end
    end
end

This is the result when running the above code:

ans =

  'ex_execution_order/car dynamics/Integrator'

2) Use "sldebug('model')" and then type "states".

For example:

>> open_system(docpath(fullfile(docroot, 'toolbox','simulink','examples','ex_execution_order')))
>> sldebug(gcs)

%----------------------------------------------------------------%

[TM = 0           ] simulate(ex_execution_order)

(sldebug @0): >> states



Continuous States for 'ex_execution_order':

Idx Value          (system:block:element Name 'BlockName')

 0. 0            (0:0:0 CSTATE 'ex_execution_order/car dynamics/Integrator')



Discrete States for 'ex_execution_order':

Idx Value          (system:block:element Name 'BlockName')

 0 0            (1:0:0 DSTATE 'ex_execution_order/discrete cruise controller/Unit Delay1')

 1 0            (1:5:0 DSTATE 'ex_execution_order/discrete cruise controller/Unit Delay')



(sldebug @0): >> quit