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Error Message, Harmonic Balance Convergence

Question asked by BURTON.C on Feb 24, 2009
I am running a harmonic balance simulation of an amplifier and switch.  Both the amplifier and switch are hierarchical models that contain subcircuits with S-parameter files and Momentum datasets (in one case, an S-parameter file has 54 ports).  Separately, the models converge during a harmonic balance simulation, but not when the models are used together.

The hpeesof window gives an error message about one of the FET models not converging.  It gives a voltage error for "angelov9.ti" and "angelov9.s".  I understand that the "angelov9" part refers to the FET model, but what are the ".ti" and ".s" referring to?  Thanks.