二进制转十进制 Fortran

ashleywu

      PROGRAM EOF

      PARAMETER(KVT=10,nt=59)

     DIMENSION ev(nt,KVT),tcf(nt,KVT)
!****  INPUT DATA ***********************************************



         open(21,file='D:\lunwen\eof\wu-biaozhunhuajuping\cishu\sjxs\Teof-cishu.grd',form='binary')
      do 345 i=1,nt
345        read(21)(tcf(i,j),j=1,KVT)
      close(21)


!*************************************************************
!****   output the time series   ******
      open(22,file='D:\lunwen\eof\wu-biaozhunhuajuping\cishu\sjxs\Teof-cishu.txt')
      do 346  i=1,nt
346     write(21,*)(ev(i,j),j=1,KVT)
               
      close(22)

         end

二进制转十进制出错提示：Compiling Fortran...
D:\lunwen\eof\sjxs\EOF.f90
D:\lunwen\eof\sjxs\EOF.f90(25): warning FOR4265: symbol EV referenced but not set
EOF.obj - 0 error(s), 1 warning(s)


本人小白，请教大家这个提示什么意思？编程错在哪里了？