运行一段程序出现的问题，请大家帮忙解决一下！

*set,air_time,5
*set,water_time,10
*set,ta,0
*get,nodenum,node,0,count
*get,nd,node,0,num,min
*dim,nodes,array,nodenum
*dim,xyz,array,nodenum,3
*dim,nodetemp,array,nodenum
*do,ii,air_time,water_time,0.01
*do,i,1,nodenum,1
nodes(i)=nd
xyz(i,1)=nx(nd)
xyz(i,2)=ny(nd)
xyz(i,3)=nz(nd)
*get,nodetemp(i),node,nodes(i),temp
ta=ta+nodetemp(i)
nd=ndnext(nd)
*enddo
avtmp=ta/nodenum
*if,avtmp,gt,t1,then
con_hf=10**(1.4-0.136*log10(avtmp)+0.629*log10(wa)+0.273*log10(u))
*elseif,avtmp,ge,t2
con_hf=10**(3.33-0.857*log10(avtmp)+0.662*log10(wa)+0.308*log10(u))
*else
con_hf=2500
*endif
sf,all,conv,con_hf,30
allsel,all
solve
*enddo

出现node 0 is not defined的警告

请问这个警告如何消除！