I have an electrical circuit driven by a controlled current source. I gather that, to view a voltage at a node, I need to connect a PS-to-Simulink converter. I've placed a couple on the diagram, but when I attempt to drag a line from an existing line to the input of the converter, only a dashed red line appears. Connecting the converter to a scope works. I'm also in trouble on the input end, where I thought I'd need to drive the current source via a Simulink=to-PS converter which in turn takes its input from a step generator. Again, attempting to drag a line from the converter to the triangle-marked port on the constant current source results only in a dashed red line.