design of two stage OTA.

[Sumit Kumar]

while performing NCC in electric vlsi, i am getting two types of mismatch 

1.parts mismatch.

2.wire mismatch

parts[1]

#1 [1] : nmos_CAP  AND

wires[2]

#1 : { }     {net@41}  [1]

#2 : {net@13}   { }     [1]

what these error means and how to remove them