(Ideal Rotational Motion Sensor) Number of variables exceeds the number of equations

I have a problem with the ideal rotational motion sensor, the code is raising an error as the following

Error compiling Simscape network for model Hw7.

Caused by:

Number of variables exceeds number of equations. Click on any Simscape blocks identified below for more detailed diagnostics.

• Hw7/Subsystem/Ideal Rotational Motion Sensor
• Hw7/Subsystem1/Ideal Rotational Motion Sensor
• Hw7/Subsystem2/Ideal Rotational Motion Sensor

component angular_velocity
% Ideal Rotational Motion Sensor

nodes
    R = foundation.mechanical.rotational.rotational; % R:left
    C = foundation.mechanical.rotational.rotational; % C:right
end

outputs
    W = { 0, 'rad/s' }; % W:right
    A = { 0, 'rad' };   % A:right
end

parameters
    wrap_angle = simscape.enum.onoff.off; % Wrap angle to [0, 2*pi]
    % 0 - Off
    % 1 - On
    offset = { 0, 'rad' }; % Initial angle
end

variables(Access = private)
    phi = {value = offset, priority = priority.high}; % Angle
end

if wrap_angle == simscape.enum.onoff.on
    equations
       A == mod(phi, {2*pi, 'rad'});
    end
else % wrap_angle == simscape.enum.onoff.off
    equations
        A == phi;
    end
end

equations
    phi.der == W;
    W == R.w - C.w;    
end

end

[Athrey Ranjith Krishnanunni]

Please attach a screenshot of the model so that we know where the error is coming from.

[Amrtanshu Raj]

Hi,

Can you attach the model ?