Android Question b4a Conversione byte code - ottimizzazione dex. Error

I have just bought b4a 7.30 (10 minutes ago).
I'm trying to compile an old App (that works with B4A 2.71) and I have an error.

if i use MaxRamForDex=1024 or 512 I have:



if i use MaxRamForDex=1536 I have:



I use Windows 10
I don't understand what i have to do.
Tks
Marco