Task Raman - nfreq failed


Just Got Here
Hi there, I am running a NWChem job with the following input:
START compound
MEMORY stack 900 heap 100 global 2000 mb
TITLE "Compound : 3-21G* geometry optimization"
GEOMETRY NOCENTER NOAUTOZ NOAUTOSYM
 LOAD format xyz "slab.opt.xyz"
END
BASIS SPHERICAL
 * library 3-21G* file /home/xxx/opt/nwchem-6.5/libraries/
END
DFT
 DIRECT
 ITERATIONS 1000
 XC xpbe96 cpbe96
 DISP vdw 2
 GRID nodisk
END
FREQ
 temperature 1 298.15
END
TASK DFT raman

where my geometry has 100 atoms, the largest is sulfur. I was running this job on a 8 core machine with 24GB ram.
Now I recieved this error:
 ------------------------------------------------------------------------
 An error occured in the Runtime Database
 ------------------------------------------------------------------------
 For more information see the NWChem manual at 
 http://nwchemgit.github.io/index.php/NWChem_Documentation


 For further details see manual section: 
                                                                                
                                                                                
                                                                                
                   
0:0:task_raman:                     nfreq failed:: -1
(rank:0 hostname:node0631 pid:3550):ARMCI DASSERT fail. ../../ga-5-3/armci/src/common/armci.c:ARMCI_Error():208 cond:0

Can someone explain me what happened? Thanks.


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