Just a guess, but could it be a problem with too big an array on the
stack? Just how big is your int_packed_data array? Calling with a
reference to the array accesses the data from the heap, but on most
compilers (don't know about ifort specifically) doing int(array) will put
a (type-converted) copy of that array on the stack. If the array is too
big to be held on the stack, you'll get a segfault there. Have you set
your stacksize to be "unlimited" (i.e., "limit stacksize unlimited" in
tcsh)?
Regards,
--Dave
Thomas Green wrote:
> NetCDF users,
>
> I am developing a program to evaluate most of the new features in
> netcdf4 and also the netcdf3 format with our current file format. I
> have now implemented packing but I am currently getting a segmentation
> fault when packing to a 32bit int (worked for a 16bit int).
>
> Using gdb I can see that it was due to nf_put_var_int (through the f90
> interface nf90_put_var). I then used the nf_put_var_int directly for
> the packing the 32 bit integers and I found the fault was caused due to
> the elemental function int within the call to nf_put_var_int.
>
> e.g.
>
> Call netcdf_check(nf_put_var_int(ncid, i, int(int_packed_data(:,:,:,:))))
>
> replaced with
>
> Call netcdf_check(nf_put_var_int(ncid, i, int_packed_data(:,:,:,:)))
>
> fixes the problem.
>
> I am using this on Linux with the intel compiler (ifort (IFORT) 10.0
> 20070426 and ifort (IFORT) 9.1 20060927).
>
> Since I have gotten it to work it isnt a major problem but obviously
> would like to understand what is going on and whether there is something
> I am doing or whether there might be a bug.
>
> Any help appreciated,
>
> Tom
>
> ---
> Thomas Green Unified Model System Analyst
> Met Office FitzRoy Road Exeter EX1 3PB United Kingdom
> E-mail: thomas.green@xxxxxxxxxxxxxxxx http://www.metoffice.gov.uk
>
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-------------------------------------------------------------------
David W. Pierce
Division of Climate, Atmospheric Science, and Physical Oceanography
Scripps Institution of Oceanography
(858) 534-8276 (voice) / (858) 534-8561 (fax) dpierce@xxxxxxxx
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