Unconstrainted points with check_timing Command

To check for constraint problems such as undefined clocking, undefined input arrival times, and undefined output constraints, use the check_timing command

pt_shell> check_timing

Information: Checking 'no_clock'.
Warning: There are 4 register clock pins with no clock.
Information: Checking 'no_input_delay'.
Information: Checking 'unconstrained_endpoints'.
Information: Checking 'generic'.
Information: Checking 'latch_fanout'.
Warning: There are 2 level-sensitive latches which fanout to
themselves.
Information: Checking 'loops'.
Warning: There are 6 timing loops in the design.
Information: Checking 'generated_clocks'.

Note: If timing paths are unconstrained, the check_timing command only reports the unconstrained endpoints, not the unconstrained startpoints. Similarly, for paths constrained only by set_max_delay, set_min_delay, or both rather than set_input_delay and set_output_delay, the check_timing command only reports any unconstrained endpoints, not unconstrained startpoints.

To check for unconstrained endpoints use:
report_timing -exceptions

reference solvnet