How to open current working directory if a certain folder doesn't exists in the directory?

So here is my code on a pushbutton callback:

prompt = {'Enter Patient Name or ID:'};

title = 'Input';

num_lines = 1;

defaultans = {'Patient'};

answer = inputdlg(prompt,title,num_lines,defaultans);

handles.file = cellstr(answer{1});

%Creating a new folder by the name of Patient's name that user entered

folder = handles.file{1}

guidata(hObject, handles);

mkdir(folder);

By far its working fine, now in a different pushbutton callback I want to display an error if the folder of same name already exists

folder = handles.file{1}

if exist(folder,'dir')

      winopen(folder);

else

      winopen(pwd);

end

But it shows error : Reference to non-existent field 'file'. Please Help. Thanks in advance

[Image Analyst]

What do you mean "bleh"? Did I answer your original question or not?

[Rena Berman]

(Answers Dev) Restored Question.

[Stephen23]

http://web.archive.org/web/20210214185521/https://www.mathworks.com/matlabcentral/answers/320823-how-to-open-current-working-directory-if-a-certain-folder-doesn-t-exists-in-the-directory

Answer 1

[Image Analyst]

Evidently your first function didn't execute so that file is not a new field attached to handles. Or guidata() didn't work, but that seems doubtful. Examine handles in the second function before it bombs (set a breakpoint) and make sure that file is a field that is still attached to handles.

[Image Analyst]

Yes that's right. If you push the second button without pushing the first button first, then file will not be attached to handles yet.