AC Sweep of an LLC converter

Hello all,

I’m trying to plot the transfer function of an LLC converter.
I get messages that the simulation has not reached steady-state in 60 cycles but when I plot the time simulations at that frequency i get pretty nice sinusoidal waveforms (attached here).

For some reason i cannot attach here the simulation itself, the upper waveform is the output signal and the bottom is the AC source.

Would appreciate any advice!