Re: [ferret_users] Error signal 11

Hi Sarah,

Signal 11 happens to be "segment violation", but that is (somewhat) useful only to programmers trying to figure out the problem. It generally indicates a problem in the program (ferret itself), and so a report of what you were doing to cause the problem, like what you gave, is much more useful to us. But this references some unknown data sets, which probably is needed to reproduce the problem.

That being said, your command to SET MEMORY /SIZE=20000 is requesting a huge amount of memory (20000 * 8M = 160 G). Your system might be using virtual memory to satisfy that request, although theoretically that should not be a problem. I do not know the size of your data sets, but you might want to see if you do this with a much smaller amount of requested memory (maybe /SIZE=100) and if the same problem still occurs.

Karl

On Wed, Nov 12, 2014 at 1:48 PM, Sarah Marcil <sarah.marcil@xxxxxxxxxxxxxx> wrote:

Hi,

I'm experiencing some trouble with Ferret since a week or two and I can't figure out what is the main problem. When I try to run a script, Ferret seems to crash with this error message: **ERROR Ferret crash; signal = 11

For the same script, sometimes it works and some other time it doesn't.

Does anyone know what signal=11 is? What can cause the crash?

Here is an example of the script, I'm trying to calculate the mean density in the mixed layer depth.

yes? cancel data/all

yes? cancel view

yes? SET MEMORY/SIZE=20000

Cached data cleared from memory

yes? let sigma0_diff_10_pi = sigma0[d=5] - 0.5*(sigma0[d=5,k=1]+sigma0[d=5,k=2])

yes? let mld_dbm_pi = if( sigma0_diff_10_pi[k=@max] GT 0.03 ) then sigma0_diff_10_pi[z=@loc:0.03] else deptho[d=4]

yes? let mld_1000= if (mld_dbm_pi GT 1000) then mld_dbm_pi else 0

yes? let mask=if (mld_1000 NE 0) then 1

yes? let sigZ=sigma0[d=5,z=@ave]

yes? let sigma=sigZ*mask

yes? let sigT=sigma[l=@ave]

yes? list sigT

**ERROR Ferret crash; signal = 11

Any help would be appreciated. Thank you very much

Sarah

Karl M. Smith, Ph.D.
JISAO Univ. Wash. and PMEL NOAA
"The contents of this message are mine personally and do
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