From the PlanAhead tool, when loading the netlist design, I seethe following messages:
"INFO: [HD-UCFReader 0] Parsing UCF File : C:\my_projects\edk_tests\12_3_test1_pa\pn_project\system.ncf
ERROR: [HD-Constr 0] Could not find net 'CLK' (file = system.ncf, line = 54)
INFO: [HD-UCFReader 1] Finished Parsing UCF File : C:\my_projects\edk_tests\12_3_test1_pa\pn_project\system.ncf
WARN: [HD-Constr 0] No definition for the group 'sys_clk_pin' is found (file = system.ncf, line = 55)
WARN: [HD-Constr 1] Ignoring timing constraint since referred group or timespec is undefined (file = system.ncf, line = 55)"
The same constraints are resolved properly when the design is run through Project Navigator.
The issue occurs if an NCF file isclassified as a UCF file in the project and is set as the current constraint set.This could happen automatically during project import of an ISE Design Suite project if the projectdoes not have a UCF file.
Changing the NCF fileclassificationor changing the target constraints setresults in a successful compilation.
In the 13.2 PlanAhead tool,the GUI and Tcl commanddo not allow the setting of NCF as target and gives an error when trying to set NCF file(s) asUCF.