In layout simulation, there is a problem of inaccurate simulation. Later, many experiments have found that it is related to the warning in the following pictures. The warning display port should not be too wide. Therefore, a very short narrow line, such as 1 mil long, is added to the wider port, and then the port is added.

    In the simulation of harmonic balance, the problem of invalid simulation points may arise. This is related to simulation settings such as scan intervals.