Diamond: How to check the un-constrained connections in Lattice Diamond?
In Lattice Diamond, when user set up the strategies for either "MAP TRACE" or "Place & Route TRACE", select "Check unconstrained Path" to "True". TRACE will list out all the connections that are not covered by preferences. To make better use of this information to correlate back to RTL, user may also select "Full Name" to "True", since it will list the full name of the related instances in the design.