Sim works fine, but parsim reports error : Unrecognized function or variable '

Hello, I met a problem related to parsim.

I parameterize the value on a subsystem parameter, change the varible value at each simulation then run the simulatoin and check the influence of the output. Here is a part of my code, Init(simu_type,autoinjectorlist) is a function that I initialize the variable to 0 and then setVariable/parameters to a specific value from a table named "T_MC_type".

Everything goes well when i use out = sim(simIn), but when I use parsim, sometimes it reports: Error evaluating parameter ''Bias_value'' in ''CheckMonteCarlo/FI1''Caused by: Unrecognized function or variable ''Bias_value_FI1''. Variable ''Bias_value_FI1'' does not exist.

I don't understand why the error occures only on Parsim, each simulation I initialize the variable and give the value.

Anyone knows the reason? Any help is appreciated.

MC_idx= 0
    for cc = 1:height(T_MC)
       MC_idx = MC_idx+1; 
       simIn(MC_idx) = Simulink.SimulationInput(gcs);
       for dd = 1:numel(T_MC_type.Properties.VariableNames)
        set_param( autoinjectorlist{dd} ,'Fault_type' ,convertCharsToStrings(T_MC_type{cc,dd}{1}))
        simIn(MC_idx) = simIn(MC_idx).setBlockParameter(autoinjectorlist{dd},'Fault_type',(T_MC_type{cc,dd}{1}));
        if contains(T_MC_type{cc,dd},"Bias")
            Init(simu_type,autoinjectorlist)
           simIn(MC_idx) = simIn(MC_idx).setVariable(append('Bias_value_',get_param(autoinjectorlist{dd},'Name')),str2double(T_MC_value{cc,dd}));
            end
        if contains(T_MC_type{cc,dd},"Delay")
           Init(simu_type,autoinjectorlist)
           simIn(MC_idx) = simIn(MC_idx).setVariable(append('Delay_value_',get_param(autoinjectorlist{dd},'Name')),str2double(T_MC_value{cc,dd}/0.001));
            end
       end
       if contains(T_MC_type{cc,dd},"Nominal")
                Init(simu_type,autoinjectorlist)
                simIn(MC_idx) = simIn(MC_idx).setBlockParameter(autoinjectorlist{dd},'Fault_type',convertCharsToStrings('Nominal'));
            end
    end
    save_system(gcs)
  out=parsim(simIn)