Description

I encounter the following error when I run a simulation using ISim:

ERROR:Simulator:19 - Instance /example_design/clkgen/ attempts to connect to a formal port named clk_in which does not exist in the instantiated module clkgen.

ERROR:Simulator:34 - Elaboration failed.

How can I resolve this error?

Solution

This error can occur if there is a port list mismatch between the declaration and instantiation of an entity/module.

To resolve this error, make sure that all the ports declared in the module/entity match exactly.