Connecting several power regulators to a single voltage input
Two things to look at (but I don't promise either one is the solution):


Most simulators like every node in the circuit to have a dc path to ground. In your circuit, the primary side of the transformer is fully isolated from ground. You can solve this by arbitrarily connecting one of the two sides of the ac source to ground, or by connecting one of them to ground through a high-value resistor.
430 mF is a very large capacitor. This value could result in an ill-conditioned problem for the simulator. When the capacitor is charged up (assuming you're doing a transient simulation and the capacitor starts out at 0 V) there will be very large currents, which could lead the simulator to giving up on the grounds that the results are unreasonable.  Try reducing this value or adding a small series resistance (like 1 ohm or so, maybe less) to C1.