MATLAB Answers


Matlab APPS, opened GUI figure and Matlab won't close

Asked by Mike
on 26 Mar 2013

I'm trying to use the Matlab APPS ability. I have an application which runs fine. When it is finished, I hit the MS-x in the corner to close it and it gives me this error:


Error using @(hObject,eventdata)machineControlGui('controlPanel_CloseRequestFcn',hObject,eventdata,guidata(hObject)) Not enough input arguments.

Error in appinstall.internal.stopapp (line 7) feval(obj.ExistCloseFcn);

Error while evaluating figure CloseRequestFcn


The application runs fine on it's own and will close without hassle if not run under the APPS tab, but running it as an "APPS" causes the error and it won't close and I can't close Matlab either unless I kill the process using task manager.

I am using the application to control instruments and take data. It is quite a few long functions which are in separate files. I have downloaded another APPS and installed it without this problem. All that APPS functionality is contained in one m-file as opposed to mine, which is in several files, text files and excel files. I just can't close it....


3 Answers

Answer by Sean de Wolski
on 26 Mar 2013
Edited by Sean de Wolski
on 26 Mar 2013
 Accepted answer

In R2012b this was a bug with GUIDE GUIs containing custom close request functions.

You can either upgrade to 13a, or remove the CloseRequestFcn and put that code in the DeleteFcn.



dbstop if error

And it'll stop on the bad line. It looks like fclose() is being called with a string other than 'all' which is not permitted.

on 27 Mar 2013

But that code has been running like that for years. It has never been "all". Why suddenly is is necessary to fclose(all)?

I have no idea, I haven't seen the code. Is it possible that this piece of code was never run until now?

If you do:

dbstop if error

Run it and stop on the faulty line, what is the line of code?

Answer by Mike
on 27 Mar 2013
Edited by Mike
on 27 Mar 2013

I think it is the NI software. I have another machine it is running fine on using 2013a, but it has a file loaded which is called NI-USI2.0.0.4901, which is missing from the machine that has the error. It calls it the Universal Storage Interface (USI), though I can't see what storage would have to do with it, but maybe something didn't install correctly. Here is the Matlab code:

    for countPort = 1:10;
        port = ['COM', num2str(countPort)];
%             OPSens = serial(port);
            OPSens = visa('ni',port);  < First error here.. RSCNAME
            %OPSens.terminator = 10;%linefeed (LF) character (ASCII hexadecimal <0x0A>)
            serialUnitID = query(OPSens, 'SYST:IDN?');
    %        if  error(lastwarn); % serialUnitID == [];
            if isempty(serialUnitID);
                error('COM port tricks eh?');
            comPortGold = 1;
            useThisComPort = port;
        catch err
            % Try a different port.
            lastwarn(''); % reset warning message


Answer by Mike
on 1 Apr 2013

For what ever reason, suddenly the VISA drivers and Matlab interaction are not talking to the USB port and the object is not opening at all, so it cannot "fclose" the empty object. Somehow I was able to get the 2 machines to start behaving Friday. Now 1 of them has reverted back and is not working. The National Instruments software works fine to test the port, just opening it through Matlab isn't working.


Mike, this is really the subject for a new question. Posting to an answered question reduces visibility.

on 3 Apr 2013

I did a new question. Not a single input. Will open a service request.

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