Strange Error while writing to powerpoint file : "createInputStream failed:"

Hi All

in my following code, I am getting a strange error and don't know where it is referring to. I am trying to create a subplot from the function I created and then use its image to write to a ppt file.

Error :

Error : "createInputStream failed:"

my code :

content = dir('*.xlsx'); 
content([content.isdir]) = [];   
files = cell(size(content)); 

for fi = 1:numel(files)
    [~, files{fi}] = fileparts(content(fi).name); 
end

for fn=1:numel(files)
    ff= xlsread(strcat(files{fn},'.xlsx'));

    t = ff(:,1);
    motiont=ff;
    maxlim=max(max(motiont(:,2:7)))
    minlim=min(min(motiont(:,2:7)))
    directory=pwd


    pptpop(motiont,minlim,maxlim,files{fn})
end

            
            
            
            
function pptpop(motion6t,minlim, maxlim,filename)

import mlreportgen.ppt.*;


images = {};


slidesFile = 'Report.pptx';
pre = Presentation(slidesFile);


slide = add(pre, 'Title Slide');

replace(slide, 'Title', 'ttt');
replace(slide, 'Subtitle', '111');

slide = add(pre, 'Title and Content');
replace(slide, 'Title', 'Contents');

slide = add(pre, 'Title and Content');
replace(slide, 'Title', 'US Census data from 1900 to 2000');

% Time interval




% Plot
myfigure(motion6t,minlim, maxlim,filename)

img = printPlot('plot1');

% Replace the Content placeholder by the plot
replace(slide, 'Content', Picture(img));

images = [images {img}]; %#ok<*NASGU>


%% Finally, close the presentation and open it in Windows
close(pre);
if ispc
    winopen(pre.OutputPath);
end

% Closing the presentation causes the images needed for the
% presentation to be copied into it. So we can now delete them.
for i = 1:length(images)
    delete(images{i});
end

% Convert figure to the specified image type.
exportgraphics(gcf, imgname)

% Delete plot figure window.
delete(gcf);



    

    
function imgname = printPlot(name)

import mlreportgen.ppt.*;

% Select an appropriate image type, depending
% on the platform.
if ~ispc
    imgtype = '-dpng';
    imgname= [name '.png'];
else
    % This Microsoft-specific vector graphics format
    % can yield better quality images in Word documents.
    imgtype = '-dmeta';
    imgname = [name '.emf'];
end
end
    
    


function myfigure(motion6t,minlim, maxlim,filename)

        
        f = figure('visible', 'off');
        

        fsize=12;
        lw= 0.7
        subplot(611);
        
        plot(motion6t(:,1),motion6t(:,2),'LineWidth',lw)
        grid;
        ylabel('Tx (mm)');
        title(filename);
        ax1=gca;
        ax1.FontSize=fsize;
        subplot(612);
        
        plot(motion6t(:,1),motion6t(:,3),'LineWidth',lw);
        grid;
        ylabel('Ty (mm)');
        ax1=gca;
        ax1.FontSize=fsize;
        subplot(613);
        
        plot(motion6t(:,1),motion6t(:,4),'LineWidth',lw);
        grid;
        ylabel('Tz (mm)');
        ax1=gca;
        ax1.FontSize=fsize;
        subplot(614);
        
        plot(motion6t(:,1),motion6t(:,5),'LineWidth',lw);
        grid;
        ylabel('Rx (deg)');
        ax1=gca;
        ax1.FontSize=fsize;
        subplot(615);
        
        plot(motion6t(:,1),motion6t(:,6),'LineWidth',lw);
        grid;
        ylabel('Ry (deg)');
        ax1=gca;
        ax1.FontSize=fsize;
        subplot(616);
        
        plot(motion6t(:,1),motion6t(:,7),'LineWidth',lw);
        grid;
        ylabel('Rz (deg)');
        xlabel('Time (sec)');
        ax1=gca;
        ax1.FontSize=fsize;
        for kk =1:6
           
            subplot(6,1,kk)
            ylim([minlim, maxlim]);
            
        end
%             fname=strcat(filename,'.jpg');
%             savefig(f,fname)
        set(gcf, 'Position',  [100, 100, 1000, 800])
%             saveas(gcf,strcat(filename,'.jpg'))
        


end

end

[farzad]

In the first debugging ,it seems the error comes from :

close(pre);

[farzad]

I should add that I restarted MATLAB and re-ran this code. the figure opens, but it can not be saved into Powerpoint. it's strange cause I have simply modified the pptpop() function lines to use my data instead of those from matlab

[farzad]

Has anyone got the chance to run the code and test it on their PC ? Windows and not Mac ? anyone ?

[Ricardo Zetina]

Hey, I had a similar error ("createInputStream failed:" when running the close command).

For me the issue was solved by changing directory to the save file location. I was using absolute paths, but still needed to be in the same folder. Maybe give that a try.

Answer 1

[Robin]

What happens if you move

exportgraphics(gcf, imgname)

above the line that closes the presentation?

Indeed, you should close the presentation first and then close the figures.

Answer 2

[Homero Restrepo Zapata]

Hello everyone,

I had to face the same issue and I will document what I did to solve it.

In my case I had a for loop that would generate 3 images that I wanted to add in a single slide.

For each iteration of the for loop I added a new slide to the powerpoint presentation.

The main idea of the solution that worked for me is:

1. To add full path to the images presentation and presentation template
2. To create the presentation and the images that I wanted to save in the current directory (pwd)
3. To open and close the presentation at each iteration of the for loop

the codes that I run at each iteration for my case are:

initialize_repport and add_slide_report that depend on template.pptx and I add on the zip file as reference. My loop varibale is res_index.

I hope this helps anyone facing this error on the community.

Kind regards

Romeo ZAPATA

Other repports on this issues found:

• Powerpoint Generation MATLAB App Issues
• Caught "std::exception" Exception message is: createInputStream failed