A max delay constraint with -datapath_only has been applied between <pin_name> and <pin_name>.
The startpoint(s) and endpoint(s) either belong to the same clock domain or belong
to two clock domains that can safely be timed together. It is only recommended to
use the -datapath_only option on paths between
clocks that do not have a known phase relationship. This DRC is waived when a
synchronizer is found on the path endpoint.