While it is not impossible, I would be very surprised to discover that Cf and Ct (in makeYbus.m, I assume?) are incorrect, but if you can create a small example that demonstrates that they are incorrect, please file a bug report at https://github.com/MATPOWER/matpower/issues
Thanks, Ray On Mar 11, 2022, at 9:12 AM, Jovan Ilic <jovan.i...@gmail.com<mailto:jovan.i...@gmail.com>> wrote: It seems that Cf and Ct calculations are wrong when some branches are disabled. Since this is fundamental data, I've been wondering what is the effect on higher level algorithms. I'll start digging through the code but maybe some of the developers could give me a quick suggestion about what to check. It is clear that Yf and Yt are also wrong while Yb is correct since makeYb does not use Cf and Ct to calculate it. Thanks, Jovan