Strange Datafield Error with 7.2.0

I changed to SDK 7.2.0 and "migrated" all my Edge Datafields to 7.2.0.

It was necessary to change all xxApp.mc files.

I use in all my datafields the (nearly) same code for inputDelegate Click Event.
It works in nearly all datafield without problems - only one Datafield throws an Error:

App.mc

import Toybox.Application;
import Toybox.Lang;
import Toybox.WatchUi;

(:background)
class EdgeAllinOne58App extends Application.AppBase {
var view = null;

    function initialize() {
        AppBase.initialize();
    }

    // onStart() is called on application start up
    function onStart(state as Dictionary?) as Void {
    }

    // onStop() is called when your application is exiting
    function onStop(state as Dictionary?) as Void {
    }

	
    /*  up to SDK 2.6.4
    //! Return the initial view of your application here
    function getInitialView() as Array<Views or InputDelegates>? {
	view = new EdgeAllinOne58View();          
        Background.registerForTemporalEvent(new Time.Duration(5 * 60)); 
        return [ view, new InputDelegate(view) ] as Array<Views or InputDelegates>;
    }
    */

    // from SDK 7
    //! Return the initial view of your application here
    function getInitialView() as [Views] or [Views, InputDelegates] {
        view = new EdgeAllinOne58View();                     
	    Background.registerForTemporalEvent(new Time.Duration(5 * 60));                           
        return [ view, new InputDelegate(view) ];     
    }
 


    function onBackgroundData(data) {
        System.println( "data=" + data );
        if ( view != null ) {	
            view.tempEdge = data;
        }
    }    

    function getServiceDelegate(){
        return [new SensDFServiceDelegate()];
    }

}

function getApp() as EdgeAllinOne58App {
    return Application.getApp() as EdgeAllinOne58App;
}

The error is thrown in the View.mc on the line (line 13 in below code):

//-------------------------------------------------------------------
class InputDelegate extends WatchUi.BehaviorDelegate {
// für tap Event
    
    var view;
    var tX;
    var tY;
    
    function initialize(v) {
        BehaviorDelegate.initialize();
        view = v;
    }
        function onTap(clickEvent) {
            var tapCoordinates = clickEvent.getCoordinates();
            tX = tapCoordinates[0];
            tY = tapCoordinates[1];
            if ( view.deviceInUse != 7 ) {
                if ( tX > 130 and tY < 100 ) {          // tap auf Varia Batterie
                    if ( view.showVariaBat == true ) {
                        view.showVariaBat = false;
                    } else {
                        view.showVariaBat = true;
                    }
                    //System.println("TAP!");
                    return true;
                }
            } else {
                return false;
            }    
        }

}