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Greetings,

I'm modeling a simple power system: generator, transformer and load. The problem comes up after I enter the transformer's (Yd5) vector group. When doing this, at the time I run the load flow, there is the following response: "Blown up after 1 iteration". On the other hand, when I omit the vector group, the load flow's result is as expected. Has anyone had the same inconvenience?