Error using Harmonic Analysis Function

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Hey,

I have created 3-Phase inverter and i want to perform Harmonic Analysis, for that I want to use ee_PlotHarmonic function, but as it only works when fixed-step solver is used or local solver in solver configuration, but when I change the configuration setting to fixed-step, the simulation doesn't run, and when i change the solver configuration to local solver I get the error "Nonlinear solver to advance time one step failed to converge due to Linear Algebra error. Failed to solve using iteration matrix". How do i solve this issue, so that my simulation runs and I can also plot THD.

Thank you !