CPHF error: "could not allocate g fock 555"


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Dear NWChem developers,

I've tried to calculate hessian for a quite large molecule, such as bacteriochlorophyll without aliphatic tail (85 atoms including Mg). I can perform this task in 6-31 basis but when I'm trying to do this in larger basis (cc-pvdz) I receive following error:

                                NWChem CPHF Module
                                ------------------


  scftype          =     RHF 
  nclosed          =      171
  nopen            =        0
  variables        =   124488
  # of vectors     =      255
  tolerance        = 0.10D-03
  level shift      = 0.00D+00
  max iterations   =       50
  max subspace     =     2550

 Grid integrated density:     342.000049006129
 Requested integration accuracy:   0.10E-06
 SCF residual:    8.5297123820759612E-004


Iterative solution of linear equations
  No. of variables   124488
  No. of equations      255
  Maximum subspace     2550
        Iterations       50
       Convergence  1.0D-04
        Start time  25707.3


   iter   nsub   residual    time
   ----  ------  --------  ---------
 rohf_h2e: could not allocate g_fock      555
 ------------------------------------------------------------------------
 ------------------------------------------------------------------------
  current input line : 
 rohf_h2e: could not allocate g_fock      555
 rohf_h2e: could not allocate g_fock      555
 ------------------------------------------------------------------------
 ------------------------------------------------------------------------
  current input line : 
     0: 
 ------------------------------------------------------------------------
 rohf_h2e: could not allocate g_fock      555
 ------------------------------------------------------------------------
 ------------------------------------------------------------------------
  current input line : 
   113: TASK dft hessian
 ------------------------------------------------------------------------


Google tells me that it problem in memory size, but memory directive was set 600 mw and RAM size is 24 Gb for 1 4-core processor.

Could you please help me with this? Is this task a really big for my machine or I'm doing something wrong?

Also, some system settings
------ Shared Memory Limits --------
max number of segments = 4096
max seg size (kbytes) = 4194304
max total shared memory (kbytes) = 20971520
min seg size (bytes) = 1

and input file:
TITLE "BChl a DFT/B3LYP cc-pvdz hessian"
START BCl_hess

MEMORY 600 mw

CHARGE 0

GEOMETRY units an 
 Mg      68.6498225237   1.0682417826  33.4119394445
 C         70.0423879873   0.2317804898  30.3702690349
 C         66.3209039567   2.9350568075  31.7901148353
 H         65.5824515564   3.5511815949  31.2756874385
 C         67.2969614933   1.8314373440  36.4222323241
 H        66.8460641461   2.1076315320  37.3743826529
 C         71.0628979431  -0.8724802993  35.0048294908
 H        71.8096892061  -1.4959959813  35.5007010752
 N       68.2527212807   1.5040652122  31.3502058912
 N       67.0604723552   2.1788158187  34.0074709894
 N       69.1186615815   0.5561049991  35.4084813430
 N       70.2412768827  -0.0346650255  32.8713656000
 C         68.9200408612   1.0363638991  30.2553501406
 C         68.2474075425   1.4684210820  28.9712893451
 H       68.9908326217   1.8571245146  28.2582902904
 C         67.3028308986   2.5810313929  29.4626149572
 H       66.2963601022   2.4696251345  29.0270320092
 C         67.2539251567   2.3322304209  30.9594402690
 C         67.8238040647   3.9846102302  29.1547875035
 H       67.8848313620   4.1468348267  28.0673070127
 H       67.1695556328   4.7597766526  29.5813827678
 H       68.8316270094   4.1266555114  29.5764570475
 C         67.5140989177   0.2960715831  28.3074341793
 H       66.6609602820  -0.0143497900  28.9330961263
 H       68.1748316037  -0.5814656698  28.2516918609
 C         67.0393900936   0.6315380698  26.9043702842
 H       67.8959428084   0.8707453431  26.2513279691
 H       66.3939038894   1.5254944473  26.8823029664
 C         66.2750957268  -0.4983512746  26.2669651773
 O         66.0809306502  -1.5818022641  26.7609942560
 O         65.8242130047  -0.1483119156  25.0494970049
 C         66.2019770051   2.8634387943  33.1910489126
 C         65.1800874402   3.5049539495  33.9757895676
 C         65.4546743207   3.1910118873  35.3067868918
 C         66.6463705693   2.3628578338  35.2946038253
 C         64.0792369444   4.3310672532  33.3969820999
 H       64.0619126899   5.3468289237  33.8185504889
 H       64.1828544243   4.4341321257  32.3100921586
 H       63.0895779537   3.8881234430  33.5872623806
 C         64.7194763824   3.5835488271  36.5285289638
 O         65.1227142574   3.2986933322  37.6466010561
 C         63.4239690635   4.3512409137  36.4036128904
 H       63.0172338824   4.4923875913  37.4115401818
 H       63.5871356792   5.3340449141  35.9373604126
 H       62.6951304713   3.8103331059  35.7823022840
 C         68.4258201119   1.0247181936  36.4717799245
 C         69.0610955640   0.5944364151  37.7795220134
 H       68.2914909824   0.1612357971  38.4385693565
 C         70.0709039663  -0.4760988514  37.3254606220
 H       71.0646435972  -0.2905535765  37.7686035591
 C         70.1249518221  -0.2620659790  35.8242263112
 C         69.7091279264   1.7780797729  38.4964184826
 H       68.9650381352   2.5508570260  38.7396137216
 H       70.1843710468   1.4512809218  39.4346017152
 H       70.4835541850   2.2411868596  37.8642612744
 C         69.6509750043  -1.9096099106  37.6775628234
 H       68.6315000738  -2.0851980930  37.2909754138
 H       70.3045266048  -2.6130990564  37.1354879405
 C         69.7099623536  -2.2089580676  39.1681709136
 H       69.4031276401  -3.2447626085  39.3767135717
 H       70.7319898213  -2.0774392194  39.5590630995
 H       69.0474407566  -1.5480697878  39.7491398820
 C         71.1390461159  -0.7853895442  33.6025792130
 C         72.0813682732  -1.4478699544  32.7313634201
 C         71.7046105992  -1.0646383239  31.4493196515
 C         70.5851781310  -0.2108836417  31.5869015423
 C         73.1980217317  -2.3467652252  33.1336018160
 H       72.8349936459  -3.2131186541  33.7095404844
 H       73.7213895282  -2.7213598226  32.2447544901
 H       73.9308498432  -1.8223205574  33.7680319384
 C         71.9814102377  -1.2334585909  30.0262530629
 O         72.8222725816  -1.8978318234  29.4634364658
 C         70.9106871126  -0.3718958198  29.2713481536
 H       70.3436072988  -1.0296514565  28.5954940299
 C         71.5435183080   0.6874125341  28.3925909631
 O         71.1209090478   1.0358245198  27.3149639037
 O         72.6190492421   1.2269322324  28.9768656048
 C         73.2728604649   2.2460447105  28.2248745801
 H       74.1412885433   2.5447617317  28.8218369638
 H       73.5914783519   1.8606897425  27.2462562107
 H       72.6020400442   3.1026999689  28.0655036368
 C         65.0942782307  -1.1642404742  24.3663913535
 H       64.8176385485  -0.7344282217  23.3971409650
 H       64.1944584933  -1.4457149271  24.9324892927
 H       65.7122721546  -2.0626743161  24.2267749465
END



BASIS
 H  library cc-pvdz
 O  library cc-pvdz
 C  library cc-pvdz
 N  library cc-pvdz
 Mg  library cc-pvdz
END

DFT
 iterations 50
 XC b3lyp
 direct
END


TASK dft hessian


Or maybe I should run this task on 1 core with extended memory limit?

Thank in advance,
Daniil Khokhlov.