LT Spice error Messages

[kk1067895]

This is the error message, how I can fix it.
Thanks

WARNING: Node NC_01 is floating.

WARNING: Node NC_02 is floating.

WARNING: Node NC_03 is floating.

WARNING: Node NC_04 is floating.


WARNING: Less than two connections to node NC_01. This node is used by M1.

WARNING: Less than two connections to node NC_02. This node is used by M2.

WARNING: Less than two connections to node NC_03. This node is used by M3.

WARNING: Less than two connections to node NC_04. This node is used by M4.

Warning: Pd = 0 is less than W.

Warning: Ps = 0 is less than W.

No AC stimulus found:

Set the value of a current or voltage source to "AC 1."

to make it behave as a signal generator for AC analysis.

Direct Newton iteration for .op point succeeded.


Date: Thu Feb 27 12:42:34 2020

Total elapsed time: 0.188 seconds.


tnom = 27

temp = 27

method = trap

totiter = 25

traniter = 0

tranpoints = 0

accept = 0

rejected = 0

matrix size = 14

fillins = 10

solver = Normal

Matrix Compiler1: 73 opcodes

Matrix Compiler2: 1.39 KB object code size

 

[HarryA]

Using a generic NMOS for NMOS_035
error on 5827_035.lib missing.

 

[Harald Kapp]

Using a generic NMOS for NMOS_035
error on 5827_035.lib missing.

When commenting the .lib statement the above error dissapears.

WARNING: Node NC_01 is floating.

The error messages with reference to floating nodes you show indicate an error in the model of the MOSFET in that library.
Unfortunately we cannot simulate as we do not have the library you're referencing in the schematic.

The error message "no ac stimulus found" is due to missing AC values for V2 and V3.