GTKD - Application crashes - or not? [Coedit]

[TheDGuy via Digitalmars-d-learn]

On Thursday, 16 June 2016 at 08:20:00 UTC, Basile B. wrote:
> Yes it's "WorkingDirectory" (and not current...). But otherwise 
> you can use args[0]. Actually using the cwd in a program is 
> often an error because there is no guarantee that the cwd is 
> the path to the application ;)
>
> People often forget that (Generally speaking).

If i use args[0] as workingDirectory i still get the same error. 
I created a custom Tool like this:

https://picload.org/image/rgwapdac/coedit_run_options.png

if i execute it via "Custom Tools" -> "Run this project" nothing 
happens.