Dec 20, 2019 - 06:55 AM
Without seeing the case it is hard to know what the issue is. There are many examples on our Knowledge Base where you can take a look. For example, try searching the keyword "IEEE" and you'll find many, such as this 9 bus system. In these examples, I believe, the transmission lines have manual entry of the Y and Z data (However, they don't have freq=0, but you can set this yourself). Looking at these examples might help you figure out what is going wrong in your case. Hope that helps!