How to run NamedPipe stream under parforloop in MatLab Appdesigner

I am developing a software in matlab that will run two functions simultaneously under parforloop. The first function has a NamedPipe object and the error is: MATLAB cannot determine whether "System" refers to a function or variable. Is the NamedPipe object supported for parforloop? Here is my code

            parfor i = 1:2
                if i == 1
                    disp(strcat('Function 1----',datestr(now)));
                    pause(2);
                    disp(strcat('Function 1----',datestr(now)));
                    NET.addAssembly('System.Core');
                    MypipeServer  = System.IO.Pipes.NamedPipeServerStream('my_pipe', ...
                                        System.IO.Pipes.PipeDirection.InOut, ...
                                        System.IO.Pipes.NamedPipeServerStream.MaxAllowedServerInstances,...
                                        System.IO.Pipes.PipeTransmissionMode.Byte,...
                                  System.IO.Pipes.PipeOptions.Asynchronous);
                    disp("Waiting for client connection...");
                    
                    MypipeServer.WaitForConnection();
                    disp("Client Connected");
                    disp('Reading data from Client');
                    pause(2);
                    sr = System.IO.StreamReader(MypipeServer);
                    %sw = System.IO.StreamWriter('E:/pipeKo.txt')
                    line = sr.ReadLine();
                    disp(line);
                else
                  %disp('Function 2');
                    disp(strcat('Function 2----',datestr(now)));
                    pause(2);
                    disp(strcat('Function 2----',datestr(now)));
                
                end
            end