Some error messages highlight the block in which the error occurs. To display the number of a port in the highlighted block, hover directly over that port. The port can be any of the following types of port:
Input data port
Output data port
Connection port for a Physical Modeling product, SimEvents®, or SimRF™
The port number appears in green, next to the port. For example, hovering over the throttle_flow port shows that its port number is 10.