The pinout LOC constraints defined in the UCF are not shown in the site column of the I/O Port window in PlanAhead tool 13.x.These were shown inPlanAhead tool 12.4. Why is that?
Even though the LOC constraints are not shown in the PlanAhead views, they do appear to be used in the implementation flow.
In PlanAhead 13.3 the netlisting phase separated a terminal and a connecting net as two separate objects. Therefore, if the LOC constraint did not match the terminal name, no association was made to the LOC constraint.
This issue has been corrected in PlanAhead tool 14.1.