Trouble when calling a bat file

i have a python script that running perfectly using the anaconda env.

i created a bat file that call to my python script, and when i double clicking the bat file it running perfectly also.

also when i call to the bat file from cmd it works fine.

BUT, when i call to the bat file from matlab2021a usung the system() it gives this error message:

"'cmd' is not recognized as an internal or external command,

operable program or batch file."

and also:

"RuntimeWarning: Couldn't find ffmpeg or avconv - defaulting to ffmpeg, but may not work

warn("Couldn't find ffmpeg or avconv - defaulting to ffmpeg, but may not work", RuntimeWarning) "

By the way, i alread add my PATH to matlab.

The biggest thing is that last night i could have run the bat file from matlab, woke up this morning and got that issue before change nothing:(

Hope for answers:) Thanks

[Image Analyst]

Show how you make up the batch file path and pass it to system(), for example

batFullFilePath  'C:\my batch.bat'
dataFullFileName = 'C:\myMovie.mp4'
commandLine = ['"' batFullFilePath '" "' dataFullFileName '"'];
system(commandLine);		

TUTORIAL: How to ask a question (on Answers) and get a fast answer

[Kfir Weissman]

i call "system(myBat.bat)"

[Kfir Weissman]

yesterday it work

[Kfir Weissman]

now it gives the error i mentioned

[Walter Roberson]

If it literally says "cmd" then you are running on MS Windows in a version before Windows XP.

... Mind you at the moment I could not swear that Windows 11 still has cmd.exe but I would think it highly likely it does.

[Kfir Weissman]

thanks for the answers, i gotta mention that i can run everything in matlab using system(), except this batch file.

[Benjamin Thompson]

I have Windows 10 and this works for me:

>> !cmd

Microsoft Windows [Version 10.0.19042.1526]

(c) Microsoft Corporation. All rights reserved.

C:\Users\ThompsonBC\Documents\MATLAB>exit

exit

If you echo the PATH in MATLAB the location of cmd.exe on your system needs to be included:

>> !echo %PATH%

C:\Program Files\MATLAB\R2021b\bin\win64;C:\windows;C:\windows\System32\Wbem;C:\windows\System32\WindowsPowerShell\v1.0\;C:\Program Files\MATLAB\R2021b\runtime\win64;C:\Program Files\MATLAB\R2021b\bin;

>>

[Kfir Weissman]

when i run "!cmd" it gives :

'cmd' is not recognized as an internal or external command,

operable program or batch file.

[Kfir Weissman]

how can i fix this dude?

[Walter Roberson]

@Kfir Weissman

Which operating system are you using? Which MATLAB release are you using?

If you are using Windows, then check inside C:\Windows\System32 to see if cmd.exe is there.

What shows up in MATLAB if you ask

getenv('PATH')

[Kfir Weissman]

Guys i solve the problem, I just restart matlab and its work..

Answer 1

[Image Analyst]

Actually I don't think this will work (what you say you are using):

system(myBat.bat)

You either have to pass in a variable, or pass in your batch filename enclosed in single or double quotes:

system("myBat.bat")

[Kfir Weissman]

I fix it, thanks!