Appdesigner does not start in Matlab 2016

When I want to start up appdesigner I do get immediately an error. How can I startup the appdesigner. I am using Windows as OS.

>> appdesigner
Warning: The following error was caught while executing
'appdesservices.internal.browser.AbstractBrowserController' class destructor:
Undefined function 'isvalid' for input arguments of type 'double'.

Error in appdesservices.internal.browser.WebWindowController/closeBrowser (line 127)
            if isvalid(obj.WebWindow) && obj.WebWindow.isWindowValid

Error in appdesservices.internal.browser.AbstractBrowserController/delete (line 51)
            obj.closeBrowser();

Error in appdesservices.internal.browser.WebWindowController (line 28)
        function obj = WebWindowController(varargin)

Error in appdesservices.internal.peermodel.BrowserControllerFactory/launchWebwindow (line 81)
            browserController = appdesservices.internal.browser.WebWindowController(varargin{:});

Error in appdesservices.internal.peermodel.BrowserControllerFactory/launch (line 73)
            browserController = obj.CallbackMethod(varargin{:});

Error in appdesigner.internal.application.AppDesignerWindowController/startBrowser (line 96)
            obj.BrowserController = obj.BrowserControllerFactory.launch(initialBrowserState);

Error in appdesigner.internal.application.AppDesignEnvironment/startAppDesigner (line 151)
                obj.AppDesignerWindowController.startBrowser(inputArguments{:});

Error in appdesigner (line 62)
appdesigner.internal.application.getAppDesignEnvironment().startAppDesigner(filePath); 
> In appdesservices.internal.browser.WebWindowController (line 28)
  In appdesservices.internal.peermodel.BrowserControllerFactory/launchWebwindow (line 81)
  In appdesservices.internal.peermodel.BrowserControllerFactory/launch (line 73)
  In appdesigner.internal.application.AppDesignerWindowController/startBrowser (line 96)
  In appdesigner.internal.application.AppDesignEnvironment/startAppDesigner (line 151)
  In appdesigner (line 62) 
Error using matlab.internal.webwindow (line 275)
Unable to start MATLABWindow process

Error in appdesservices.internal.browser.WebWindowController/startBrowser (line 70)
            webWindow = matlab.internal.webwindow(browserOptions.URL,...

Error in appdesservices.internal.browser.AbstractBrowserController (line 47)
            obj.startBrowser(browserOptionsStruct);

Error in appdesservices.internal.browser.WebWindowController (line 30)
            obj = [e-mail]r(varargin{:});

Error in appdesservices.internal.peermodel.BrowserControllerFactory/launchWebwindow (line 81)
            browserController = appdesservices.internal.browser.WebWindowController(varargin{:});

Error in appdesservices.internal.peermodel.BrowserControllerFactory/launch (line 73)
            browserController = obj.CallbackMethod(varargin{:});

Error in appdesigner.internal.application.AppDesignerWindowController/startBrowser (line 96)
            obj.BrowserController = obj.BrowserControllerFactory.launch(initialBrowserState);

Error in appdesigner.internal.application.AppDesignEnvironment/startAppDesigner (line 151)
                obj.AppDesignerWindowController.startBrowser(inputArguments{:});

Error in appdesigner (line 62)
appdesigner.internal.application.getAppDesignEnvironment().startAppDesigner(filePath);

>>

Answer 1

[Harish Ramachandran]

• Try the command below, restart MATLAB and open Appdesigner

restoredefaultpath

• In MATLAB, go to "Preferences -> MATLAB -> Web" and see if "Use a proxy server to connect to the internet" is checked. If it is, uncheck this option and see if the issue persists.
• If the issue still persists check out the link below: https://www.mathworks.com/support/bugreports/1483341

[Sybrand Bonsma]

Thanks for your answer. After step 1 and 2 the issue still persists. For step 3 I will contact our system administrator.

[Harish Ramachandran]

Sure. Judging from the bug report it looks like it was a prevalent issue and by adding that patch providing in the zip file, things should be back to normal.

Answer 2

[Michael Blanchard]

I suffer from same issue on R2016b. I followed steps above and those in the bug report. It did not work for me on Linux.