How to change the initial condition of a customized block on Simscape?

Dear all,

The default "Thermal Mass" block on SIMSCAPE presents Mass and Specific Heat as parameters. Since I would like The Specific Heat changes with the temperature (i.e., it changes each substep) I had created a custom block on SIMSCAPE called "OnlyMass" according to the code below. I'd built it using "ssc_build OnlyMass" and then I had solved my problem.

However, now I would like to assume a different initial temperature for such mass. However, when I try to do it an error occurs according to the image below.

Then, all bodies I have using such custom block starts with the same temperature :/.

How to fix this problem?

component OnlyMass
% Thermal Mass
% This block models internal energy storage in a thermal network. The rate
% of temperature increase is proportional to the heat flow rate into the
% material and inversely proportioanl to the mass and specific heat of the
% material.

% Copyright 2005-2016 The MathWorks, Inc.

nodes
    M = foundation.thermal.thermal; % M:top
end

inputs                  
    sp_heat = {447, 'J/(kg*K)'};  % c:bottom
end

parameters
    mass    = {1,   'kg'      }; % Mass
end

variables
    % Differential variables
    T = {value = {295.15, 'K'}, priority = priority.high}; % Temperature
    Q = {0, 'W'}; % Heat flow rate
end

branches
    Q : M.Q -> *;
end

equations
    assert(mass > 0)
    assert(sp_heat > 0)
    T == M.T;
    Q == mass * sp_heat * T.der;
    assert(T > 0, 'Temperature must be greater than absolute zero')
end

end