ID:12909 Cannot parse Routing Constraints File <name>, line <number>: the line refers to port "<name>", but this port does not exist.

CAUSE: If you are importing database from a previous version of Quartus, the current version of Quartus is not able to load the routing results from the database. If you are creating a Routing Constraints File by hand, the RCF refers to a bad port name.

ACTION: Re-run the Fitter. If applicable, fix manual routing in any RCF files that you have created.