Progress 10.2A answer from .net dll

[datareform]

Hello,
I need the answer / error of a call from an assembly.
The function looks like:
gclass-MDEGeraetQO:Bestellungauslesen(vc-pc, NO).
gclass-MDEGeraetQO = my dll
Bestellungauslesen = my Method: no call back parameter! - void!
public void BestellungAuslesen(string ZielDateiname, bool DateiAufGerätLöschen = true)
{
....
}
and now I want to get the Exception of the method wether it occurs.

With
'IF ERROR-STATUS:ERROR' it doesn't work.
Does anyone has a solution?
Kind regards Matthias