Why doesn SPR route some of the signals in my netlist?
If SPR routes some signals but not others, check the netlist and make sure none of the core I/O signals are prefixed with PAD_. Rename the signals so they are not prefixed by PAD_ and re-run SPR. The PAD_ prefix is a reserved keyword in SPR. Please make sure not to prefix any signals with PAD_. !Please remember to reinitialize SPR if the netlist has changed by pressing the Initialize Setup button in the Tools > SPR > Setup… dialog. This will re-initialize the I/O signals.
