After selecting Manual Compile Order, I run Behavioral Simulation and get the following error.
"ERROR: The Top module has not been specified. This can happen if no sources have been added to the project, or if you are using Manual Compile Order mode and have not entered the name of the top module in the Top Module field."
The "Specify Top Level Instance Names" property is correctly set in the Simulation Properties.
Is this the setting the error message is referring to?