As per my understanding, the model has Variant subsystem and the active choice of the Variant subsystem has some unconnected lines. When the model advisor check- ‘Identify unconnected lines, input ports, and output ports’ (check ID: mathworks.design.UnconnectedLinesPorts) is run, the check should have reported the issue. But the model advisor check did not report it.
I tried to reproduce the issue till R2014a and could see model advisor reporting the warning.

Given this, it seems like this stand fixed as of R2014a.
