Mismatch between rlCreateEnvTemplate() and rlTable()

If rlTable() requires scalar inputs then why can't I change the ObservationInfo in the environment template from rlNumericSpec([4 1]); to rlFiniteSetSpec([1 2 3 4])?

I created an environment from template, like:

rlCreateEnvTemplate("myEnvClass");
env = myEnvClass;

The environment validates fine, using

validateEnvironment(env);

The problem comes when setting up sarsaAgent, which first requires creation of an rlTable object as an input parameter:

>> qTable = rlTable(getObservationInfo(myenv), getActionInfo(myenv));
Error using rlTable/validateInput (line 131)
Input must be a scalar rlFiniteSetSpec.
Error in rlTable (line 51)
                validateInput(obj, ObservationInfo)

So then I figured changing these lines (from myEnvClass.m):

        function this = myEnvClass()
            % Initialize Observation settings
            ObservationInfo = rlNumericSpec([4 1]);

to:

        function this = myEnvClass()
            % Initialize Observation settings
            ObservationInfo = rlFiniteSetSpec([1 2 3 4]);

would do the trick. By now the environment won't validate:

>> env = myEnvClass;
>> validateEnvironment(env);
Error using rl.env.MATLABEnvironment/validateEnvironment (line 28)
Environment 'ObservationInfo' does not match observation output from reset function. 
            Check the data type, dimensions, and range.

And I don't see how to change the reset function to make it work. Here it is from the template generated environment class:

        % Reset environment to initial state and output initial observation
        function InitialObservation = reset(this)
            % Theta (+- .05 rad)
            T0 = 2 * 0.05 * rand - 0.05;  
            % Thetadot
            Td0 = 0;
            % X 
            X0 = 0;
            % Xdot
            Xd0 = 0;
            
            InitialObservation = [T0;Td0;X0;Xd0];
            this.State = InitialObservation;
            
            % (optional) use notifyEnvUpdated to signal that the 
            % environment has been updated (e.g. to update visualization)
            notifyEnvUpdated(this);
        end

This doesn't make sense because this same reset() function returns a 4 row column vector:

>> reset(env)
ans =
   -0.0108
         0
         0
         0

like the one expected from the class definition:

>> getObservationInfo(env)
ans = 
  rlFiniteSetSpec with properties:
       Elements: [4×1 double]
           Name: "CartPole States"
    Description: "x, dx, theta, dtheta"
      Dimension: [1 1]
       DataType: "double"
>> ans.Elements
ans =
     1
     2
     3
     4

And I'd like to point out that changing the datatype set within the reset() function, like this:

            InitialObservation = rlFiniteSetSpec([T0 Td0 X0 Xd0]);
            this.State = InitialObservation;

doesn't help:

>> env = myEnvClass;
>> validateEnvironment(env);
Error using rl.env.MATLABEnvironment/validateEnvironment (line 22)
There was an error evaluating the reset function.

Caused by:
    Error using myEnvClass/set.State (line 165)
    Expected State to be one of these types:

    double, single, uint8, uint16, uint32, uint64, int8, int16, int32, int64

    Instead its type was rl.util.rlFiniteSetSpec.

[Dev Soni]

Did you find the answer?