ncl遇到的error

小琢子爱芒果

warning:Right hand side has no coordinate variable can not delete coordinate variable of a file, use (/ .. /) to avoid this message
warning:["Execute.c":8637]:Execute: Error occurred at or near line 42 in file 80.ncl

warning:Right hand side has no coordinate variable can not delete coordinate variable of a file, use (/ .. /) to avoid this message
warning:["Execute.c":8637]:Execute: Error occurred at or near line 43 in file 80.ncl

此为ncl运行出现的问题
42行为：ncdf->lat=latitude
42行为：ncdf->lon=longitude
出错原因是latitude没有坐标变量
以前的程序为：latitude=new((/80/), float, "No_FillValue")
                      latitude!0="stn"
再加上：latitude&stn=ispan(1,80,1)就好了