problems about node is floating

Hello!

I am a learner,when I ask ORCAD to generate a file,there are many same mistakes,the output file is as follows:I don't know how to solve it,anyone who is one ,please give me help,I will appreciate you very much!

thank you!

kanghc85

** Creating circuit file "1-schematic1-2sincos.sim.cir"
** WARNING: THIS AUTOMATICALLY GENERATED FILE MAY BE OVERWRITTEN BY SUBSEQUENT SIMULATIONS

*Libraries:
* Local Libraries :
* From [PSPICE NETLIST] section of pspiceev.ini file:
.lib "nom.lib"

*Analysis directives:
.TRAN  0 1000ns 0
.PROBE
.INC "1-SCHEMATIC1.net"

**** INCLUDING 1-SCHEMATIC1.net ****
* source 1
R_R14         6 5  8.2k 
R_R15         11 10  8.2k 
R_R16         GND 3  13k 
R_R17         GND 13  13k 
R_R5         -15V N00748  500 
R_R7         -15V N01034  500 
R_R8         -15V N01037  500 
R_R6         -15V N01098  500 
R_R11         1 +15V  3.3k 
R_R12         2 +15V  3.3k 
R_R13         14 +15V  3.3k 
R_R2         6 N00154  4k 
R_R1         5 N00148  4k 
R_R3         -15V N00283  500 
R_R9         10 N00936  4k 
R_R10         11 N00969  4k 
R_R4         -15V N00286  500 
V_V1         4 8 
+SIN 0 1 50 0 0 0
V_V2         9 12 
+SIN 0 1 50 0 0 0

**** RESUMING 1-schematic1-2sincos.sim.cir ****
.INC "1-SCHEMATIC1.als"

**** INCLUDING 1-SCHEMATIC1.als ****
.ALIASES
R_R14           R14(1=6 2=5 )
R_R15           R15(1=11 2=10 )
R_R16           R16(1=GND 2=3 )
R_R17           R17(1=GND 2=13 )
R_R5            R5(1=-15V 2=N00748 )
R_R7            R7(1=-15V 2=N01034 )
R_R8            R8(1=-15V 2=N01037 )
R_R6            R6(1=-15V 2=N01098 )
R_R11           R11(1=1 2=+15V )
R_R12           R12(1=2 2=+15V )
R_R13           R13(1=14 2=+15V )
R_R2            R2(1=6 2=N00154 )
R_R1            R1(1=5 2=N00148 )
R_R3            R3(1=-15V 2=N00283 )
R_R9            R9(1=10 2=N00936 )
R_R10           R10(1=11 2=N00969 )
R_R4            R4(1=-15V 2=N00286 )
V_V1            V1(+=4 -=8 )
V_V2            V2(+=9 -=12 )
_    _(+15V=+15V)
_    _(1=1)
_    _(3=3)
_    _(2=2)
_    _(9=9)
_    _(4=4)
_    _(10=10)
_    _(-15V=-15V)
_    _(7=-15V)
_    _(5=5)
_    _(14=14)
_    _(8=8)
_    _(6=6)
_    _(13=13)
_    _(11=11)
_    _(12=12)
_    _(GND=GND)
_    _(GND=GND)
_    _(-15V=-15V)
_    _(+15V=+15V)
.ENDALIASES

**** RESUMING 1-schematic1-2sincos.sim.cir ****
.END

ERROR -- Less than 2 connections at node 3
ERROR -- Less than 2 connections at node 13
ERROR -- Less than 2 connections at node N00748
ERROR -- Less than 2 connections at node N01034
ERROR -- Less than 2 connections at node N01037
ERROR -- Less than 2 connections at node N01098
ERROR -- Less than 2 connections at node 1
ERROR -- Less than 2 connections at node 2
ERROR -- Less than 2 connections at node 14
ERROR -- Less than 2 connections at node N00154
ERROR -- Less than 2 connections at node N00148
ERROR -- Less than 2 connections at node N00283
ERROR -- Less than 2 connections at node N00936
ERROR -- Less than 2 connections at node N00969
ERROR -- Less than 2 connections at node N00286
ERROR -- Less than 2 connections at node 4
ERROR -- Less than 2 connections at node 8
ERROR -- Less than 2 connections at node 9
ERROR -- Less than 2 connections at node 12
ERROR -- Node 6 is floating
ERROR -- Node 5 is floating
ERROR -- Node 11 is floating
ERROR -- Node 10 is floating
ERROR -- Node GND is floating
ERROR -- Node 3 is floating
ERROR -- Node 13 is floating
ERROR -- Node -15V is floating
ERROR -- Node N00748 is floating
ERROR -- Node N01034 is floating
ERROR -- Node N01037 is floating
ERROR -- Node N01098 is floating
ERROR -- Node 1 is floating
ERROR -- Node +15V is floating
ERROR -- Node 2 is floating
ERROR -- Node 14 is floating
ERROR -- Node N00154 is floating
ERROR -- Node N00148 is floating
ERROR -- Node N00283 is floating
ERROR -- Node N00936 is floating
ERROR -- Node N00969 is floating
ERROR -- Node N00286 is floating
ERROR -- Node 4 is floating
ERROR -- Node 8 is floating
ERROR -- Node 9 is floating
ERROR -- Node 12 is floating