In project mode, the tool automatically reads the last DCP produced by the most recent synthesis in default mode, or any DCP file you specify. In non-project mode, read the reference DCP before synthesis using the following command:
read_checkpoint -auto_incremental -incremental<path to dcp file>
Or
read_checkpoint -incremental <path to dcp file>
After this, run the synth_design command as normal.
Note: The
-auto_incremental
option in read_checkpoint is the same as the default
behavior in the IDE.