Ok Christian, no need to sorry. You have provided us enough. I just want to report. My 580 can go back to mine groestl. Still have the best performance with ccminer5 for Fermi cards.

Btw, I have tried to fix the bugs with config file in ccminer and the thing I came up with is by deleting these two if clause in parse_config and parse_cmdline function. Ugly quick fix but it works:

if (opt_algo == ALGO_HEAVY && opt_vote == 9999) {
fprintf(stderr, "%s: Heavycoin hash requires block reward vote parameter (see --vote)\n",
argv[0]);
show_usage_and_exit(1);
}

With this the config file could be read but a few options are unavailable e.g. --quiet.
I will try to read the code and find the bugs too when I have time. Luckily your code are readable and I understand German too.

Regards,