This is a spinoff of the thread found here: https://electronics.stackexchange.com/questions/115510/proteus-8-error-timestamp-too-small
I have found that a lot of the problems I have been running into were due to the feedback transformer coils not being grounded. I wanted to ask why in the world a simulation software would require that each of the coils on a transformer be grounded, when in real life that is not always the case? It makes no sense to me.
My question is how might I get around this, if it's possible at all? My circuit places the primary inside a circuit, and neither side can be grounded.
The above is the circuit I am using, and the transformer in question is the one labeled "FEEDBACK_XFMR".