ID:39064 Can't generate Quartus Routing Exchange File <name> -- make sure you can write to the file and directory

CAUSE: You attempted to generate the specified Quartus Routing Exchange File (.qref) by running quartus_cdb with the --write_routing_constraint option. However, quartus_cdb cannot generate the file. This error can occur if you do not have permission to write to the file and directory for the QREF.

ACTION: Make sure that you have permission to write to the file and directory for the QREF you are generating.