Hi Erel
Sorry to use your time on this thread but I think the Problem was on my PC.
I always was thinking this is a Memory problem and it was but in an other way I expected.
I never watch my memory in my PC because the PC is function normal and give me not any error.
This week I have seen, that I only have 7GB instead of 8GB in my PC.
Testing the Memory there was not any problem.
After set the Bios, I never touch for a while, to Default settings I get 8GB back.
Reinstall B4J 2.8 I don't see any errors anymore.
I will watch this and will let you know if something else is going on.
Thanks again for your very good support.
Cheers
Swissmade