ID:17065 Synthesis swept away <number> nodes. For details of what was eliminated, see the Optimization Results || Nodes Synthesized Away report panel for Partition: "<name>".

CAUSE: During synthesis, some elements were found to contribute nothing to the functionality of the circuit.

ACTION: Check the Compilation Report, Optimization, Nodes Swept Away During Synthesis to ensure there are no major part of your design missing. It is not unusual for synthesis to optimize away some registers, but if significant parts of the design are optimized away,it usually indicates an error in the design.