running ccsd(t) yields ccsd t communication error


Clicked A Few Times
Hello,
while attempting to run the ccsd(t) job attached below,
nwchem exits with error
2:ccsd_t:Received an Error in Communication
application called MPI_Abort(comm=0x84000002, 3) - process 2

nwchem (6.6) was running in parallel, called by command
mpirun -n 12 nwchem nwchem.nw

ccsd iteration converged correctly, and the output stopped at

---output---------------------------------------------------------------
Iterations converged
CCSD correlation energy / hartree = -2.026966306386194
CCSD total energy / hartree = -663.114251887695218

Singles contributions

Doubles contributions
CR-CCSD(T)
ccsd_t 3
------------------------------------------------------------------------
------------------------------------------------------------------------
current input line :
0:

---input-----------------------------------
echo
start
memory stack 500 mb heap 100 mb global 2000 mb
charge -1

geometry
C 1.1475 2.6138 0.0013
C 0.0399 3.5686 0.0008
C -1.2853 2.9557 -0.0025
C -1.4541 1.6018 -0.0044
C -0.3523 0.6769 -0.0031
C 0.9620 1.2612 -0.0006
C_3 -0.6503 -0.6957 -0.0026
C_2 0.1335 -1.8586 -0.0005
C_3 1.5571 -1.8614 -0.0001
C_1 -0.4774 -3.1789 0.0012
O_0 -1.8569 -3.1594 0.0003
O_2 0.1058 -4.2534 0.0033
N 2.7219 -1.8533 0.0001
O 0.2136 4.8036 0.0030
H 2.1520 3.0374 0.0032
H -2.1399 3.6327 -0.0036
H -2.4646 1.1863 -0.0071
H 1.8313 0.6080 -0.0005
H -1.7178 -0.9150 -0.0038
H_0 -2.0978 -4.1023 0.0019
end
basis spherical
H_0 library pc-1
O_2 library pc-1
O_0 library pc-1
C_1 library pc-1
C_2 library pc-1
C_3 library pc-1
N library pc-1
C library pc-1
H library pc-1
O library pc-1
end

scf
 rohf
end

tce
 freeze atomic
cr-ccsd(t)
tilesize 16
attilesize 16
  1. io sf
 2eorb
2emet 15
end

task tce energy



Forum Vet
memory
Fulvio
Your job ran out of local (i.e.g stack memory)
Please modify your input memory line

memory stack 1500 mb heap 100 mb global 2000 mb

Clicked A Few Times
thank you
Thank you Edoardo,
I have several of these computations to do, of different sizes.
It would be very nice if nwchem could suggest the minimum amount of resources needed for the requested computation.
Or have you got any suggestion that could help prevent these failures?

Fulvio

Gets Around
TCE CCSD(T) memory usage goes as O(tilesize^6). The prefactor depends on which theory you are running, but standard CCSD(T) should be 2*tilesize^6, in addition to whatever is required by CCSD.

It's very hard to be more precise about this. Sorry.


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