[ncl-talk] Segmentation Fault in Addfile() function with Grib2 files

[David Brown]

Hi Michael,
This definitely sounds like a bug. Can you either point us to a URL
where we can download an example of a file that fails or else upload
an example to our ftp site, using the instructions at
http://www.ncl.ucar.edu/report_bug.shtml. Be sure to let us know the
exact name of the file you upload. Thanks.
 -dave

On Fri, Oct 30, 2015 at 6:53 AM, mcolbert93 <mcolbert93 at gmail.com> wrote:
> Hello NCL Users,
>
> I'd like to use NCL to plot a set of grib2 files.  The files are of NAM
> output in 5-minute intervals spanning over 36 hours.  The files contain a
> field called "forecast_time" which has a value 0-36 for the on-the-hour
> files, but a value in minutes (0-2155) for the 5-minute intervals between
> the hours.  NCL has no trouble reading any of the 5-minute files via
> "addfile()" for the first 17 hours.  However at 17:05, when
> forecast_time=1025, NCL's "addfile()" command gives the error "Segmentation
> fault (core dumped)."  This problem persists for all 5-minute files between
> hours 17 and 36.  We hypothesize this is because the value of forecast_time
> (1025) may be exceeding the allotted storage space for forecast_time in NCL
> (10 bits?... i.e. 2^10=1024)  Would anyone be able to confirm/refute this
> hypothesis and provide a way to work around it?
>
> Thank you,
> Michael
>
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