Honored Contributor
Honored ContributorBelow is the Help page for that error message. Did this page not show up when you right-clicked the message and selected "Help"? (I found it at "Messages List" at the bottom of the Help Contents tab.) Or did you find this page but just didn't find the Help to be helpful?
If you don't have location constraints for the next-to-last sentence, then maybe that new PIO caused the situation in the last sentence. Maybe the PIO device pins are too close to DDIO pins or close enough that the Fitter gets the associated logic too close if you don't manually prevent it. --- Quote Start --- Hard routing constraints for signal <name> could not be satisfied -------------------------------------------------------------------------------- CAUSE: Routing constraints for the specified signal cannot be satisfied. Because they were marked as hard, the Fitter is forced to abandon routing. Note that hard routing constraints could by generated by the Fitter for special parts of the design, such as DDIO logic. ACTION: If you marked the constraints as hard, either remove the "hard" specification or change the constraints. If you did not do this, remove all of your constraints associated with the net in question. User-set constraints may conflict with Fitter-generated constraints for special logic, such as DDIO or DQS. If the violated hard routing constraints are for DDIO or DQS logic and there are no location constraints for that logic, try removing location constraints that would force any other logic into the same LAB as the mentioned DDIO or DQS logic. If the Fitter placed a carry chain into the same LAB, force the chain to go into another LAB with location constraints. --- Quote End ---
