hi,
I back annotated netlist with the sdf file which is generated by Primetime from spef file. But when I was running the post-simulation with ncverilog, I got the messages,
ncelab: *W,SDFRDE: Read error for default code, skipping annotation of tst13.sdf.X.
ncelab: *W,SDFRDE: Read error for default code, skipping annotation of tst13.sdf.X.
ncelab: *W,SDFRDE: Read error for default code, skipping annotation of tst13.sdf.X.
which are the same messages in the thread below.
https://www.edaboard.com/threads/193499/
Refering to the solution, I have tried to delete the .X file and run again. But the messages are still there.
BTW, if I use the sdf file generated by ICC instead, the back annotation can be done successfully. However, I am not going to use this method due to the low accuracy delay information of this sdf file.
Can anyone tell me the possible reasons of why my PT generated sdf file can not be used for back annotation with ncverilog?vv