good. so no NPE?

ooh

the NPE is something else

sorry two separate problems

it is just NPE randomly when I have my splash screen displayed. I have no idea how I can debug that as the trace doesn't show anything coming from my program

and it happens so sporadically that it is really hard to reproduce

it looks like that

why aren't you using a task?

that's not thread safe at all

^ that's not you right...you were just googling?

the second link is not me no

I just found someone with the same problem…

doesn't mean that I'm not doing thread unsafe things…

most of that code your runAsync gist isn't threadsafe

you should only call updateProgress() and updateMessage() in a JavaFX task

then let the Task framework update any progresslabels

things like stage.minWidth should be moved to a ui {} function

something like this...

runAsync { updateMessage("Setting up controller...") ExceptionController().doSomething() } ui { // ui stuff }

so I make a function in splash for update Message

this has an example of TaskStatus binding https://courses.bekwam.net/public_tutorials/bkcourse_tornadofx_mdi.html

you'll do something like label.textProperty().bind( status.message )

the only thing that should go in runAsync{} is non-JavaFX code like file manipulations. make sure there's nothing FX-y in ExceptionController

if there is, then the ExceptionController needs to move to ui{}

I've had bad results wrapping everything in runLater() like some suggest because it may execute all the runLaters() at the very end . this can appear like a long pause and then quickly going form 0-100%

also, don't swallow exceptions like this. a missing file might be common } catch (e: FileNotFoundException) { }

so it is fine if I update the simpleStringProperty

but not if I access the text widget directly