power ground connection

xiaoyisimonguo

I am running floor planning in ICCafter created floorplan, then  derive_pg_connection I got this good indication:
Information: connected 8778 power ports and 8778 ground ports

connected!

but after the follow a few commands:
create_fp_placement
create_rectilinear_rings
create_power_straps

the verify_pg_nets gave me these: did I break anything?
Checking [VSS]:
        ERROR: There are 42 floating shapes
        ERROR: There are 8775 floating pins
Checking [VDD]:
        ERROR: There are 35 floating shapes
        ERROR: There are 8772 floating pins


Then after
preroute_standard_cells

verify_pg_nets reported these:
Checking [VSS]:        ERROR: There are 20 floating shapes        ERROR: There are 92 floating pinsChecking [VDD]:        ERROR: There are 18 floating shapes        ERROR: There are 90 floating pinsChecked 2 nets, 2 have Errors
Please help, I don't know if it is normal at this stage: before placement, CTS, and route