In MATLAB, "uifigure" objects are intended to function as standalone windows and cannot be directly embedded into live scripts. This limitation is also noted under the unsupported functionalities of Graphics in App Designer. Functions like "save", "load", "saveas", and "print" cannot be used with "uifigure" objects.
If you want to save the content of your app window, you can use the "exportapp" function to export it as an image or PDF.
For more information, refer to the sections on 'Unsupported Functionality of Graphics in App Designer' and the "exportapp" function below.
Hope this addresses your query.
