谁能帮我看看哪错了？

500) {this.resized=true; this.width=500; this.alt='这是一张缩略图，点击可放大。\n按住CTRL，滚动鼠标滚轮可自由缩放';this.style.cursor='hand'}" onclick="if(!this.resized) {return true;} else {window.open('http://u.dianyuan.com/bbs/u/39/1142912001.gif');}" onmousewheel="return imgzoom(this);">
显示错误：
source PRACTICE1
R_R7         0 N07298  1k  
R_R2         N07294 OUT  6k2  
R_R3         0 N07210  100  
R_R8         N07326 OUT  5k1  
R_R4         0 N07158  0.1  
R_R5         N07198 N07174  100  
V_V2         IN N07150 DC 0Vdc AC 18Vac
R_R1         N07174 N07170  1K8  

**** RESUMING practice1-schematic1-practice1.sim.cir ****
.END

ERROR -- Less than 2 connections at node N07298
ERROR -- Less than 2 connections at node N07294
ERROR -- Less than 2 connections at node N07210
ERROR -- Less than 2 connections at node N07326
ERROR -- Less than 2 connections at node N07158
ERROR -- Less than 2 connections at node N07198
ERROR -- Less than 2 connections at node IN
ERROR -- Less than 2 connections at node N07150
ERROR -- Less than 2 connections at node N07170
ERROR -- Node N07294 is floating
ERROR -- Node OUT is floating
ERROR -- Node N07326 is floating
ERROR -- Node N07198 is floating
ERROR -- Node N07174 is floating
ERROR -- Node IN is floating
ERROR -- Node N07150 is floating
ERROR -- Node N07170 is floating


可是我的每一个节点都接好了阿，为什么啊？？？