Errors in app designer 2020b

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Carlos S
Carlos S 2022-2-2
编辑： prabhat kumar sharma 2023-10-6
I created a GUI in apdesigner a while back (possibly in v2019b). I tried to re-run it in v202b and it fails to run. I get the following error messages (XXXXXXXX refers to my application):
Unable to resolve the name matlab.apps.internal.GraphicsCallbackProxy.
Error in appdesigner.internal.service.AppManagementService (line 36)
obj.CallbackProxy = matlab.apps.internal.GraphicsCallbackProxy;
Error in appdesigner.internal.service.AppManagementService.instance (line 45)
obj = appdesigner.internal.service.AppManagementService();
Error in matlab.apps.AppBase/registerApp (line 47)
ams = appdesigner.internal.service.AppManagementService.instance();
Error in XXXXXXXX (line 596)
registerApp(app, app.LocationErrorMapUIFigure)
I then created a new empty GUI in appdesigner and when trying to run it I get similar errors.
I have tried a posted solution:
rehash toolboxcache
without success.
  4 个评论
显示 2更早的评论
Benjamin Thompson
Benjamin Thompson 2022-2-3
You can post binary files including mlapp. There is a size limit for files but this type should not be a problem.
Carlos S
Carlos S 2022-2-3
See posted dummy app (one edit field, one button). I get the following error when running:
Warning: The following error was caught while executing 'matlab.apps.AppBase' class destructor:
Unable to resolve the name matlab.apps.internal.GraphicsCallbackProxy.
Error in appdesigner.internal.service.AppManagementService (line 36)
obj.CallbackProxy = matlab.apps.internal.GraphicsCallbackProxy;
Error in appdesigner.internal.service.AppManagementService.instance (line 45)
obj = appdesigner.internal.service.AppManagementService();
Error in matlab.apps.AppBase/delete (line 9)
ams = appdesigner.internal.service.AppManagementService.instance();
Error in app1 (line 50)
createComponents(app)
> In app1 (line 50)
Unable to resolve the name matlab.apps.internal.GraphicsCallbackProxy.
Error in appdesigner.internal.service.AppManagementService (line 36)
obj.CallbackProxy = matlab.apps.internal.GraphicsCallbackProxy;
Error in appdesigner.internal.service.AppManagementService.instance (line 45)
obj = appdesigner.internal.service.AppManagementService();
Error in matlab.apps.AppBase/registerApp (line 47)
ams = appdesigner.internal.service.AppManagementService.instance();
Error in app1 (line 53)
registerApp(app, app.UIFigure)

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回答（1 个）

prabhat kumar sharma
编辑：prabhat kumar sharma 2023-10-6
Hi Carlos,
I understand that you are facing an issue while running the app using MATLAB App Designer. I have tried to reproduce the issue with the “app1.mlapp” file you shared, and it appears that the application worked correctly on my side.
I believe that this issue could be caused by one of the following reasons:
1.Please ensure that the path to your new application is added to MATLAB. It can be done as follows:
  1. Launch MATLAB.
  2. Navigate to your file in current folder.
  3. Right click on your file and select “Add to path > Selected File”.
2. The error you are receiving is usually caused by MATLAB having a pathing error. To resolve this error, please run the following commands in MATLAB in order:
restoredefaultpath
savepath
I hope this information helps you resolve the issue you are experiencing.
Best regards,
Prabhat Sharma

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