Problem with displaying output of executable

I have a function which produces a string output:

out = myfunction(arg1, arg2)

The last line of the function is disp(out).

I used the deploytool to produce an executable (for Windows). However, when I call myfunction arg1 arg2 in cmd, I do not see any output.

I know the function is working correctly because if I replace disp by writing to a file, that works.

Also what is strange is that if I replace disp() by error(), I do see the error message.

Has anybody had this problem?

Answer 1

[Kevin Holst]

If you're compiling it as a 'Windows Standalone Application' switch that to a 'Console Standalone Application'.

Answer 2

[Antti]

Note that in R2017b (and possibly beyond) on Windows 10, no output is printed on the Windows command prompt even if you launch the executable from command prompt, unless you uncheck "Do not display the Windows command shell (console) for execution" under "Additional runtime settings" in the Application Compiler tool of MATLAB Compiler.

[Image Analyst]

I guess that applies for leaving the semicolon off, but is that also the case if you explicitly call fprintf() to print something to the command window (consolw window)? Like if I do

fprintf('This goes to the command window.\n');

where, if anywhere, will that show up?

[Ian Sullivan]

Could you confirm that this is this new behaviour introduced in R2017b please? I am getting console output when using R2017a.

[Antti]

If you leave the checkbox I mentioned above checked, then no output is shown on the command window, not even if you explicitly call fprintf. Everything is suppressed. But if you uncheck the checkbox, then leaving the semicolon off, and calling printing functions will output. This behavior is introduced in R2017b.

[ratnesh pandey]

@Antti Yes, that was the case with me. Thanks. I am using R2017b and only after unchecking the checkbox I am getting the result on console.

[derrick burton]

Thanks !!

Answer 3

[Image Analyst]

Did you use the -e option to suppress the console window? If so there is no place for things like disp() and fprintf(1,...) to output to. Otherwise they should show up in the console window (the black box window).

Answer 4

[Veronika]

Kevin, your solution helped, thanks! I thought the problem was elsewhere and did not consider the type of compiling.

Image Analyst, I used the deploytool with the default option (probably without supressing, because it works now).

Thanks for the quick replies!