While running my simulation I get the following error at about 0.1 simulation time. This started occurring when i changed the PI parameters for a voltage controller for inverter which is connected in parallel to PV buck-boost converter.
Attached figure shows the schematic with PV , TPFC(totem pole power factor correction) and Dual active bridge.
I have tried chnageing tolerances, varying step size, changing solvers. I do not want to revert back with the PI parameters of inverter. Is there anyway this can be solved?