Synopsys IC Compiler: Open Nets Error

-- LVS START : --
Total area error in layer 0 is 0. Elapsed = 0:00:00, CPU = 0:00:00
Total area error in layer 1 is 0. Elapsed = 0:00:00, CPU = 0:00:00
Total area error in layer 2 is 0. Elapsed = 0:00:00, CPU = 0:00:00
ERROR : area [(76.630,6.335), (76.830,6.535)] 0.0400 um sqr.
ERROR : area [(0.000,10.845), (0.200,11.045)] 0.0400 um sqr.
ERROR : area [(76.630,10.845), (76.830,11.045)] 0.0400 um sqr.
ERROR : area [(76.630,14.945), (76.830,15.145)] 0.0400 um sqr.
ERROR : area [(76.630,19.045), (76.830,19.245)] 0.0400 um sqr.
ERROR : area [(76.630,23.145), (76.830,23.345)] 0.0400 um sqr.
ERROR : area [(76.630,27.655), (76.830,27.855)] 0.0400 um sqr.
ERROR : area [(76.630,31.755), (76.830,31.955)] 0.0400 um sqr.
ERROR : area [(76.630,35.855), (76.830,36.055)] 0.0400 um sqr.
Total area error in layer 3 is 9. Elapsed = 0:00:00, CPU = 0:00:00
Total area error in layer 4 is 0. Elapsed = 0:00:00, CPU = 0:00:00
Total area error in layer 5 is 0. Elapsed = 0:00:00, CPU = 0:00:00
Total area error in layer 6 is 0. Elapsed = 0:00:00, CPU = 0:00:00
Total area error in layer 7 is 0. Elapsed = 0:00:00, CPU = 0:00:00
Total area error in layer 8 is 0. Elapsed = 0:00:00, CPU = 0:00:00
Total area error in layer 9 is 0. Elapsed = 0:00:00, CPU = 0:00:00
Total area error in layer 10 is 0. Elapsed = 0:00:00, CPU = 0:00:00
Total area error in layer 11 is 0. Elapsed = 0:00:00, CPU = 0:00:00
Total area error in layer 12 is 0. Elapsed = 0:00:00, CPU = 0:00:00
Total area error in layer 13 is 0. Elapsed = 0:00:00, CPU = 0:00:00
Total area error in layer 14 is 0. Elapsed = 0:00:00, CPU = 0:00:00
Total area error in layer 15 is 0. Elapsed = 0:00:00, CPU = 0:00:00
ERROR : OUTPUT PortInst h3/c2/presentstate_reg[0] QN doesn't connect to any net.

** Total Floating ports are 1.
** Total Floating Nets are 0.
** Total SHORT Nets are 0.
ERROR : Logical Net VSS is open.
Node 342 is in the region ((2,2),(76,73)).
Node 339 is in the region ((5,69),(71,71)).
Node 341 is in the region ((5,5),(67,5)).
Total seperated nodes are 3.
Potential connection region ((4, 4), (68, 70)).
** Total OPEN Nets are 1.
** Total Electrical Equivalent Error are 0.
** Total Must Joint Error are 0.

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