Let's hunt the bug!
Hehe, thanks a lot for willing to help!
I will immediately try your great hints!
Well, I think AfA_OS is not the problem, as I installed it under a pure OS3.9 for test reasons and the OS didn't not freeze. So I assume AfA_OS is not the problem.
For test reasons I also installed "AmigaSYS" (but be sure, I like AmiKit more), and under AmigaSYS all goes well, too! No freezing while compiling. So it really seems, that a specific program/patch causes the problem (which is not active under AmigaSYS).
But I will try the WBStartuP and sequence way ...
@Toni: Thanks for that additional hint! But sorry, unfortunately I have no idea where to ender the -log parameter.
Under "misc" I enabled logging and the log files are created. But I don't know where to add "-log" ... Sorry ...