What does the "invalid port" error mean?

Hi, I'm currently completing an assignment and when I run my code and GUI, I receive the error "invalid port". Would anyone be able to help me in identifying why this error is occurring?

My code and GUI are attached.

function varargout = Assignment3(varargin)
% ASSIGNMENT3 MATLAB code for Assignment3.fig
%      ASSIGNMENT3, by itself, creates a new ASSIGNMENT3 or raises the existing
%      singleton*.
%
%      H = ASSIGNMENT3 returns the handle to a new ASSIGNMENT3 or the handle to
%      the existing singleton*.
%
%      Assignment3('CALLBACK',hObject,eventData,handles,...) calls the local
%      function named CALLBACK in Assignment3.M with the given input arguments.
%
%      ASSIGNMENT3('Property','Value',...) creates a new ASSIGNMENT3 or raises the
%      existing singleton*.  Starting from the left, property value pairs are
%      applied to the GUI before Assignment3_OpeningFcn gets called.  An
%      unrecognized property name or invalid value makes property application
%      stop.  All inputs are passed to Assignment3_OpeningFcn via varargin.
%
%      *See GUI Options on GUIDE's Tools menu.  Choose "GUI allows only one
%      instance to run (singleton)".
%
% See also: GUIDE, GUIDATA, GUIHANDLES

% Edit the above text to modify the response to help Assignment3

% Last Modified by GUIDE v2.5 26-May-2015 14:59:05

% Begin initialization code - DO NOT EDIT gui_Singleton = 1; gui_State = struct('gui_Name', mfilename, ... 'gui_Singleton', gui_Singleton, ... 'gui_OpeningFcn', @Assignment3_OpeningFcn, ... 'gui_OutputFcn', @Assignment3_OutputFcn, ... 'gui_LayoutFcn', [] , ... 'gui_Callback', []); if nargin && ischar(varargin{1}) gui_State.gui_Callback = str2func(varargin{1}); end

if nargout [varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:}); else gui_mainfcn(gui_State, varargin{:}); end % End initialization code - DO NOT EDIT

% --- Executes just before Assignment3 is made visible. function Assignment3_OpeningFcn(hObject, eventdata, handles, varargin) % This function has no output args, see OutputFcn. % hObject handle to figure % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) % varargin command line arguments to Assignment3 (see VARARGIN)

% Choose default command line output for Assignment3 handles.output = hObject;

% Update handles structure guidata(hObject, handles);

% % set(handles.coms,'UserData',getAvailableCOM5); % set(handles.FlowData,'UserData',zeros(1,2)); % set(handles.PreasureData,'UserData',zeros(1,2)); % set(handles.Time,'UserData',0); % set(handles.COM,'UserData','COM8');

% UIWAIT makes Assignment3 wait for user response (see UIRESUME) % uiwait(handles.figure1);

% --- Outputs from this function are returned to the command line. function varargout = Assignment3_OutputFcn(hObject, eventdata, handles) % varargout cell array for returning output args (see VARARGOUT); % hObject handle to figure % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA)

% Get default command line output from handles structure varargout{1} = handles.output;

function FlowValue_Callback(hObject, eventdata, handles) % hObject handle to FlowValue (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of FlowValue as text % str2double(get(hObject,'String')) returns contents of FlowValue as a double

% --- Executes during object creation, after setting all properties. function FlowValue_CreateFcn(hObject, eventdata, handles) % hObject handle to FlowValue (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows. % See ISPC and COMPUTER. if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor')) set(hObject,'BackgroundColor','white'); end

% --- Executes on selection change in popupmenu1. function popupmenu1_Callback(hObject, eventdata, handles) % hObject handle to popupmenu1 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA)

% Hints: contents = cellstr(get(hObject,'String')) returns popupmenu1 contents as cell array % contents{get(hObject,'Value')} returns selected item from popupmenu1

% --- Executes during object creation, after setting all properties. function popupmenu1_CreateFcn(hObject, eventdata, handles) % hObject handle to popupmenu1 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles empty - handles not created until after all CreateFcns called

% Hint: popupmenu controls usually have a white background on Windows. % See ISPC and COMPUTER. if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor')) set(hObject,'BackgroundColor','white'); end

function PreasureValue_Callback(hObject, eventdata, handles) % hObject handle to PreasureValue (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of PreasureValue as text % str2double(get(hObject,'String')) returns contents of PreasureValue as a double

% --- Executes during object creation, after setting all properties. function PreasureValue_CreateFcn(hObject, eventdata, handles) % hObject handle to PreasureValue (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows. % See ISPC and COMPUTER. if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor')) set(hObject,'BackgroundColor','white'); end

% --- Executes on selection change in popupmenu3. function popupmenu3_Callback(hObject, eventdata, handles) % hObject handle to popupmenu3 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA)

% Hints: contents = cellstr(get(hObject,'String')) returns popupmenu3 contents as cell array % contents{get(hObject,'Value')} returns selected item from popupmenu3

% --- Executes during object creation, after setting all properties. function popupmenu3_CreateFcn(hObject, eventdata, handles) % hObject handle to popupmenu3 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles empty - handles not created until after all CreateFcns called

% Hint: popupmenu controls usually have a white background on Windows. % See ISPC and COMPUTER. if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor')) set(hObject,'BackgroundColor','white'); end

% --- Executes on button press in LiveDataRadio. function LiveDataRadio_Callback(hObject, eventdata, handles) % hObject handle to LiveDataRadio (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA)

% Hint: get(hObject,'Value') returns toggle state of LiveDataRadio

% --- Executes on button press in EfficencyTrendRadio. function EfficencyTrendRadio_Callback(hObject, eventdata, handles) % hObject handle to EfficencyTrendRadio (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA)

% Hint: get(hObject,'Value') returns toggle state of EfficencyTrendRadio

% --- Executes on button press in radiobutton6. function radiobutton6_Callback(hObject, eventdata, handles) % hObject handle to radiobutton6 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA)

% Hint: get(hObject,'Value') returns toggle state of radiobutton6

% -------------------------------------------------------------------- function File_Callback(hObject, eventdata, handles) % hObject handle to File (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA)

% -------------------------------------------------------------------- function Untitled_2_Callback(hObject, eventdata, handles) % hObject handle to Untitled_2 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA)

% -------------------------------------------------------------------- function Save_Callback(hObject, eventdata, handles) % hObject handle to Save (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA)

% --- Executes on button press in LiveDataBtn. function pushbutton23_Callback(hObject, eventdata, handles) % hObject handle to LiveDataBtn (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) set(handles.pushbutton22,'UserData',0) set(handles.pushbutton23,'UserData',1)

while get(handles.pushbutton22,'UserData')==0 if (ismember((get(handles.edit6,'string')),(get(handles.coms,'UserData'))))==1 delete (instrfind) s = serial('COM8');

        fopen(s)

        set(handles.PreasureData,'UserData',zeros(1,2));
        set(handles.Time,'UserData',0);
        set(handles.FlowData,'UserData',zeros(1,2));
        set(handles.FlowData,'UserData',zeros(1,2));
        set(handles.pushbutton25,'UserData',zeros(1,2));
        set(handles.pushbutton26,'UserData',0);

        cla(handles.axes14)
        cla(handles.axes15)
        cla(handles.axes16)

        while get(handles.pushbutton23,'UserData')==1

            if (get(handles.Time,'UserData'))== 0

                flushinput(s)

                t=(get(handles.Time,'UserData'))+1;
                set(handles.Time,'UserData',t)

                FlowDataColected(t,1) = fscanf(s,'%i L/Hr');
                FlowDataColected(t,2) = t;
                set(handles.FlowData,'UserData',FlowDataColected);

                PreasureDataColected(t,1) = fscanf(s,'%f kPa');
                PreasureDataColected(t,2) = t;
                set(handles.PreasureData,'UserData',PreasureDataColected);

            else
                flushinput(s)

                t=(get(handles.Time,'UserData'))+1;
                set(handles.Time,'UserData',t)

                FlowDataColected = get(handles.FlowData,'UserData');
                a(1,1) = fscanf(s,'%i L/Hr');
                a(1,2) = t;
                FlowDataColected = vertcat(FlowDataColected,a);
                set(handles.FlowData,'UserData',FlowDataColected);

                PreasureDataColected = get(handles.PreasureData,'UserData');
                a(1,1) = fscanf(s,'%f kPa');
                a(1,2) = t;
                PreasureDataColected = vertcat(PreasureDataColected,a);
                set(handles.PreasureData,'UserData',PreasureDataColected);

            end

            set(handles.text37,'String',num2str(FlowDataColected(t,1)));
            set(handles.text39,'String',num2str(PreasureDataColected(t,1)));

            axes(handles.axes15);
            plot(FlowDataColected(:,1))
            xlim([t-20 t])

            axes(handles.axes16);
            plot(PreasureDataColected(:,1),'g')
            xlim([t-20 t])

            axes(handles.axes14);
            PreasureDataColected = get(handles.PreasureData,'UserData');
            FlowDataColected = get(handles.FlowData,'UserData');

            if t>1
                delta = abs((PreasureDataColected((t-1),1))-(PreasureDataColected((t),1)));
                Tol = get(handles.edit7,'string');
                if get(handles.edit7,'string')> delta
                    if get(handles.pushbutton26,'UserData')>=1
                    STABLEDATAC = ([PreasureDataColected(t,1) FlowDataColected(t,1)]);
                    STABLEDATAO = get(handles.pushbutton25,'Userdata');

                    STABLEDATA = vertcat(STABLEDATAO,STABLEDATAC);
                    set(handles.pushbutton25,'Userdata',STABLEDATA);

                    PLOT = get(handles.pushbutton26,'UserData')+1;
                    set(handles.pushbutton26,'UserData',PLOT)

                    else
                    STABLEDATA = ([PreasureDataColected(t,1) FlowDataColected(t,1)]);
                    set(handles.pushbutton25,'Userdata',STABLEDATA)
                    PLOT = get(handles.pushbutton26,'UserData')+1;
                    set(handles.pushbutton26,'UserData',PLOT)
                    end
                    cla
                    STABLEDATA = get(handles.pushbutton25,'Userdata');

                    STABLEDATA(:,1) = STABLEDATA(:,1)/10;
                    STABLEDATA;
                    scatter(STABLEDATA(:,2),(STABLEDATA(:,1)),100,'b.');
                    hold all

                    minimum = min(STABLEDATA,[],1);
                    maximum = max(STABLEDATA,[],1);                
                                        sz = size(STABLEDATA);

                    p = polyfit((STABLEDATA(:,1)),STABLEDATA(:,2),2);

                    x1 = linspace(minn(1,2), maxx(1,2), sz(1,1));
                    y1 = polyval(p,x1);

                    plot(x1,y1,'r');

                    axis auto

                end
            end

            pause(1)

        end

    else
        COMerror = errordlg('INVALID PORT');
        set(handles.pushbutton22,'UserData',1)
        set(handles.pushbutton23,'UserData',0)
        set(handles.ErrorStat,'UserData',1)
        break
    end
end
delete (instrfind)

% --- Executes on button press in StopBtn. function pushbutton22_Callback(hObject, eventdata, handles) % hObject handle to StopBtn (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) set(handles.pushbutton22,'UserData',1) set(handles.pushbutton23,'UserData',0)

% -------------------------------------------------------------------- function Setup_Callback(hObject, eventdata, handles) % hObject handle to Setup (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA)

% -------------------------------------------------------------------- function Untitled_4_Callback(hObject, eventdata, handles) % hObject handle to Untitled_4 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA)

% --- Executes on button press in StopBtn. function pushbutton3_Callback(hObject, eventdata, handles) % hObject handle to StopBtn (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA)

% --- Executes on button press in pushbutton5. function pushbutton5_Callback(hObject, eventdata, handles) % hObject handle to pushbutton5 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA)

% --- Executes on button press in pushbutton8. function pushbutton8_Callback(hObject, eventdata, handles) % hObject handle to pushbutton8 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA)

% --- Executes on button press in pushbutton6. function pushbutton6_Callback(hObject, eventdata, handles) % hObject handle to pushbutton6 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA)

% --- Executes on button press in pushbutton7. function pushbutton7_Callback(hObject, eventdata, handles) % hObject handle to pushbutton7 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA)

% --- Executes on button press in pushbutton10. function pushbutton10_Callback(hObject, eventdata, handles) % hObject handle to pushbutton10 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA)

% --- Executes on button press in Time. function Time_Callback(hObject, eventdata, handles) % hObject handle to Time (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA)

% --- Executes on button press in FlowData. function FlowData_Callback(hObject, eventdata, handles) % hObject handle to FlowData (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA)

% --- Executes on button press in PreasureData. function PreasureData_Callback(hObject, eventdata, handles) % hObject handle to PreasureData (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA)

% --- Executes on button press in COM. function COM_Callback(hObject, eventdata, handles) % hObject handle to COM (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA)

% --- Executes on button press in coms. function coms_Callback(hObject, eventdata, handles) % hObject handle to coms (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA)

% --- Executes when selected object is changed in uipanel5. function uipanel5_SelectionChangeFcn(hObject, eventdata, handles) % hObject handle to the selected object in uipanel5 % eventdata structure with the following fields (see UIBUTTONGROUP) % EventName: string 'SelectionChanged' (read only) % OldValue: handle of the previously selected object or empty if none was selected % NewValue: handle of the currently selected object % handles structure with handles and user data (see GUIDATA)

% --- Executes on button press in ErrorStat. function ErrorStat_Callback(hObject, eventdata, handles) % hObject handle to ErrorStat (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA)

function edit6_Callback(hObject, eventdata, handles) % hObject handle to edit6 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of edit6 as text % str2double(get(hObject,'String')) returns contents of edit6 as a double

% --- Executes during object creation, after setting all properties. function edit6_CreateFcn(hObject, eventdata, handles) % hObject handle to edit6 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows. % See ISPC and COMPUTER. if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor')) set(hObject,'BackgroundColor','white'); end

function edit7_Callback(hObject, eventdata, handles) % hObject handle to edit7 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of edit7 as text % str2double(get(hObject,'String')) returns contents of edit7 as a double

% --- Executes during object creation, after setting all properties. function edit7_CreateFcn(hObject, eventdata, handles) % hObject handle to edit7 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows. % See ISPC and COMPUTER. if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor')) set(hObject,'BackgroundColor','white'); end

% --- Executes on button press in pushbutton25. function pushbutton25_Callback(hObject, eventdata, handles) % hObject handle to pushbutton25 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA)

% --- Executes on button press in pushbutton26. function pushbutton26_Callback(hObject, eventdata, handles) % hObject handle to pushbutton26 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA)

% --- Executes on button press in pushbutton27. function pushbutton27_Callback(hObject, eventdata, handles) % hObject handle to pushbutton27 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) StableData = get(handles.pushbutton25,'Userdata'); StableData(:,1) = StableData(:,1)/10; filename = [get(handles.edit8,'String') '.xlsx']; sheet = get(handles.edit9,'String'); xlswrite(filename,StableData,sheet)

function edit8_Callback(hObject, eventdata, handles) % hObject handle to edit8 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of edit8 as text % str2double(get(hObject,'String')) returns contents of edit8 as a double

% --- Executes during object creation, after setting all properties. function edit8_CreateFcn(hObject, eventdata, handles) % hObject handle to edit8 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows. % See ISPC and COMPUTER. if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor')) set(hObject,'BackgroundColor','white'); end

function edit9_Callback(hObject, eventdata, handles) % hObject handle to edit9 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of edit9 as text % str2double(get(hObject,'String')) returns contents of edit9 as a double

% --- Executes during object creation, after setting all properties. function edit9_CreateFcn(hObject, eventdata, handles) % hObject handle to edit9 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows. % See ISPC and COMPUTER. if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor')) set(hObject,'BackgroundColor','white'); end

% --- Executes on button press in pushbutton28. function pushbutton28_Callback(hObject, eventdata, handles) % hObject handle to pushbutton28 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) set(handles.pushbutton22,'UserData',1) set(handles.pushbutton23,'UserData',0)

filename = [get(handles.edit10,'String') '.xlsx']; sheet = get(handles.edit11,'String'); LoadedData = xlsread(filename,sheet); axes(handles.axes14); cla scatter(LoadedData(:,2),(LoadedData(:,1)),100,'b.'); hold all

minimum = min(LoadedData,[],1); maximum = max(LoadedData,[],1);

sz = size(LoadedData);

plot = polyfit((LoadedData(:,1)),LoadedData(:,2),2);

x1 = linspace(minimum(1,2), maximum(1,2), sz(1,1)); y1 = polyval(plot,x1);

plot(x1,y1,'r');

axis auto

function edit10_Callback(hObject, eventdata, handles) % hObject handle to edit10 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of edit10 as text % str2double(get(hObject,'String')) returns contents of edit10 as a double

% --- Executes during object creation, after setting all properties. function edit10_CreateFcn(hObject, eventdata, handles) % hObject handle to edit10 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows. % See ISPC and COMPUTER. if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor')) set(hObject,'BackgroundColor','white'); end

function edit11_Callback(hObject, eventdata, handles) % hObject handle to edit11 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of edit11 as text % str2double(get(hObject,'String')) returns contents of edit11 as a double

% --- Executes during object creation, after setting all properties. function edit11_CreateFcn(hObject, eventdata, handles) % hObject handle to edit11 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows. % See ISPC and COMPUTER. if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor')) set(hObject,'BackgroundColor','white'); end