It's still not really enough to go on. Presumably the convergence difficulty is caused by some numerical instability in the circuit - and without seeing the data, it's going to be very hard to debug (you didn't mention which device makes the difference). Usually small timesteps are caused by discontinuities in the device models, combined with large component values (or negative component values). I see you have a 500pF cap there, which is large (for IC) but not immense. There appear to be some 50uF capacitors too - but maybe that's just the resolution of the image - driving these with a 10u/0.5u transistor seems a bit hopeful.
Maybe you should contact customer support? Then we can properly look at your data, maybe.