I found this bellow code in internet. While I run the code I noticed following errors.

clc
clear all;
close all;

filename = 'Registration_Details.xls';
[num,txt] = xlsread(filename);

len=length(txt);
blankimage = imread('certificate_Blank.tiff');
for i=1:len
    for j= 2:2 
        text_names(i,j)=txt(i,j);
    end
end
% Obtain names from the txt variable which are in 2nd column

for i=1:len
    for j= 3:3
      text_topic(i,j)=txt(i,j);
    end
end

for i=2:len
        text_all=[text_names(i,2) text_topic(i,3)];
        
        position = [100 258;120 416];         
        
        RGB = insertText(blankimage,position,text_all,'FontSize',22,'BoxOpacity',0);
        
        figure
        imshow(RGB)        
        
        y=i-1;
        filename=['Certificate_Topic_' num2str(y)];
        lastf=[filename '.png'];
        saveas(gcf,lastf)
end 

Errors:

Error using matlab.graphics.internal.name (line 101)

Cannot create output file '.\Certificate_Topic_1.png'.

Error in print (line 71)
pj = matlab.graphics.internal.name( pj );

Error in saveas (line 181)
        print( h, name, ['-d' dev{i}] )

Error in MainCode (line 36)
        saveas(gcf,lastf)

Answer 1

[Jan]

This is a strange and inefficient code. Replace e.g.

for i=1:len
    for j= 2:2 
        text_names(i,j)=txt(i,j);
    end
end

to

text_names(:, 2) = txt(:, 2);

The actual error message can be caused by a write-protected folder. The solution is to write the output to a folder, in which you have write-permissions.