I've created and compiled an app with B4J on a windows 10 laptop that works perfectly - displaying all objects.
When I move that same project to another windows 10 laptop and "Compile and Run" from the B4J menu, all I am able to see is a blank screen - the form with no objects.
Seems that all files are the same between the two laptops.
No, only log is "Program started." However, if I click on the bottom right portion of the blank screen - where the Exit button is but is not displayed - the ExitApplication closes the form.
Some computers (depending on graphics hardware} can have a problem if the form style is set to 'UNIFIED'
Try setting it to "DECORATED" to see if the controls become visible.
You can check if a machine supports UNIFIED by using
B4X:
Dim Platform As JavaObject
If Platform.InitializeStatic("javafx.application.Platform").RunMethod("isSupported",Array("UNIFIED_WINDOW")) Then
MainForm.SetFormStyle("UNIFIED") ' can use unified
Else
MainForm.SetFormStyle("DECORATED") ' use alternate style
End If