ID:17952 <name> preservation of unused RX channels is enabled. Preserving <number> unused RX channel location(s).

CAUSE: Specifies the number of unused RX channel locations.

ACTION: To preserve the performance of specific unused RX/TX channels over time, add the assignment 'set_instance_assignment -name PRESERVE_UNUSED_XCVR_CHANNEL ON -to <pin_name>' in your QSF file.