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AR# 36198: 12.1 PlanAhead - Constraint changes made in the Implemented Design view are not passed to the "impl_1\.ucf"
12.1 PlanAhead - Constraint changes made in the Implemented Design view are not passed to the "impl_1\.ucf"
I load the netlist design and make some constraint changes in the Implemented Desgin Environment, and re-implement the design, but none of the constraint changes I made are being applied. Why does this occur?
This is a known issue in the PlanAhead software. If the Netlist Design is loaded and constraint changes are made in the Implemented Design environment, they are not passed to the < design >.ucf. If the Netlist Design is not loaded, the new constraints appear in the < design >.ucf as expected. This has been fixed in the 12.2 release of the PlanAhead software.