[ncl-talk] variable metadata getting overwritten when variable is written to a NetCDF4 file

[Dennis Shea]

A JIRA ticket [  NCL-2302 ] has been opened.  THX

On Mon, Nov 2, 2015 at 8:06 AM, Keith Lindsay <klindsay at ucar.edu> wrote:
> Hi,
>
> I have come across an instance where I'm writing a variable to a file and
> the variable metadata in the file is getting overwritten, even though I'm
> using (/ ... /) on the right-hand side of the write to file statement. That
> is, the statement
> f->$varname$ = (/ tmpvar /)
> is overwriting the metadata for the file variable $varname$ in the file
> pointed to by f. The attached script demonstrates the problem. This seems
> like an ncl bug to me.
>
> Details of my script that seem to matter are:
> 1) the file is NetCDF4
> 2) the file variable whose metadata is getting overwritten has been defined
> in the file but not written to yet
> 3) the file variable whose metadata is getting overwritten does not have the
> _FillValue attribute
> 4) the variable on rhs of write to file statement has _FillValue attribute
>
> The problem happens with ncl 6.3.0 on yellowstone. It does not happen with
> ncl 6.2.1, though with 6.2.1 the _FillValue gets added to the file
> variable's metadata, which is unexpected to me.
>
> Keith
>
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