App crash!

[rtz333]

App crash when i use seekbar Column and Print Size? Can you check that @natario1 ?

E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.otaliastudios.printer.demo, PID: 20594
java.lang.IllegalArgumentException: parameter must be a descendant of this view
at android.view.ViewGroup.offsetRectBetweenParentAndChild(ViewGroup.java:6328)
at android.view.ViewGroup.offsetDescendantRectToMyCoords(ViewGroup.java:6246)
at com.otaliastudios.printer.DocumentView.zoomToView(DocumentView.java:431)
at com.otaliastudios.printer.DocumentView.access$300(DocumentView.java:42)
at com.otaliastudios.printer.DocumentView$3.run(DocumentView.java:401)
at android.os.Handler.handleCallback(Handler.java:883)
at android.os.Handler.dispatchMessage(Handler.java:100)
at android.os.Looper.loop(Looper.java:227)
at android.app.ActivityThread.main(ActivityThread.java:7822)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1026)