[ncl-talk] warning:["FileSupport.c":3894]:NCL does not know anything about file suffix <csv>.

[grace]

Hi:
  All,I have write a script to read and calculate .csv data according to the "Reading csv"example on the NCL website,but it appears warning and fatal:


 warning:["FileSupport.c":3894]:NCL does not know anything about file suffix <csv>. 
 But NCL will try its best to figure out the file format.


 fatal:An internal error has occurred. The file format requested does not appear to be supported, could not open (/public/home/huanglei/cmaqdata/20160615/Caotan.csv)
 warning:["FileSupport.c":3894]:NCL does not know anything about file suffix <csv>. 
 But NCL will try its best to figure out the file format.
 ........
.........
........




This is my script:
   ;
begin


 filename1=systemfunc("ls /public/home/huanglei/cmaqdata/2016*/Caotan.csv")
     fin1=addfiles(filename1,"r")




	 time_al= new((/29,24/),float,"No_FillValue")
     oth_al = new((/29,24/),float,"No_FillValue")
     xa_al  = new((/29,24/),float,"No_FillValue")
     tc_al  = new((/29,24/),float,"No_FillValue")
     bj_al  = new((/29,24/),float,"No_FillValue")
     xy_al  = new((/29,24/),float,"No_FillValue")
     wn_al  = new((/29,24/),float,"No_FillValue")
     ya_al  = new((/29,24/),float,"No_FillValue")
	 hz_al  = new((/29,24/),float,"No_FillValue")
     yl_al  = new((/29,24/),float,"No_FillValue")
     ak_al  = new((/29,24/),float,"No_FillValue")
	 sl_al  = new((/29,24/),float,"No_FillValue")
     do i=0,28
            
          ;---Read in file as array of strings so we can parse each line.
       lines  = asciiread(fin1[i],-1,"string")
       nlines = dimsizes(lines)-1   ; First line is a header


    ;
    ; Start reading in the fields we care about:
    ; The first line is a header, so skip this.
    ;
      delim     = ","
      time = str_get_field(lines(1:25),1,delim)  
      oth  = str_get_field(lines(1:25),2,delim)  
      xa   = str_get_field(lines(1:25),3,delim)  
      tc   = str_get_field(lines(1:25),4,delim)  
	  bj   = str_get_field(lines(1:25),5,delim)  
      xy   = str_get_field(lines(1:25),6,delim)  
      wn   = str_get_field(lines(1:25),7,delim)  
      ya   = str_get_field(lines(1:25),8,delim)
	  hz   = str_get_field(lines(1:25),9,delim)  
      yl   = str_get_field(lines(1:25),10,delim)  
      ak   = str_get_field(lines(1:25),11,delim)  
      sl   = str_get_field(lines(1:25),12,delim)


            	
             time_al(i,:)= time  	
			 oth_al(i,:) = oth  
			 xa_al(i,:)  = xa  
			 tc_al(i,:)  = tc  
			 bj_al(i,:)  = bj  
			 xy_al(i,:)  = xy  
			 wn_al(i,:)  = wn  
			 ya_al(i,:)  = ya  
             hz_al(i,:)  = tc  
			 yl_al(i,:)  = bj  
			 ak_al(i,:)  = xy  
			 sl_al(i,:)  = wn 
	
	 end do


              time_all=ndtooned(time_al)
			  oth_all=ndtooned(oth_al)
			  xa_all=ndtooned(xa_al)
			  tc_all=ndtooned(tc_al)
			  bj_all=ndtooned(bj_al)
			  xy_all=ndtooned(xy_al)
			  wn_all=ndtooned(wn_al)
              ya_all=ndtooned(xy_al)
			  hz_all=ndtooned(wn_al)
			  yl_all=ndtooned(ya_al)  
			  ak_all=ndtooned(ak_al)
			  sl_all=ndtooned(sl_al) 




     print(time_all)


  ; calculate the avg


              oth_avg=avg(oth_al)
			  xa_avg=avg(xa_all)
			  tc_avg=avg(tc_all)
			  bj_avg=avg(bj_all)
			  xy_avg=avg(xy_all)
			  wn_avg=avg(wn_all)
              ya_avg=avg(xy_all)
			  hz_avg=avg(wn_all)
			  ya_avg=avg(ya_all)  
			  ak_avg=avg(ak_all)
			  sl_avg=avg(sl_all)


			  ssx = hz_avg + ak_avg + sl_avg
			  nsx = ya_avg + ya_avg




end




My NCL version is 6.2.0.
 How can I slove the problem?
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