HI,
Entropy calculations are very memory hungry jobs. What amount of memory you have on your machine on which you are attempting the calculation? And how many cpu cores are you using?
Best Regards
Elvis Martis
Ph.D. Student (Computational Chemistry)
at Bombay College of Pharmacy
A Kalina, Santacruz [E], Mumbai 400098, INDIA
W www.elvismartis.in
Skype. adrian_elvis12
-----Original Message-----
From: wei [mailto:lwstudy.sina.com]
Sent: Thursday, February 09, 2017 10:07 AM
To: amber <amber.ambermd.org>
Subject: [AMBER] Failed to calculate entropy with mm_pbsa.pl in AMBER14, with no error informations reported in nmode_com.1.out
Dear all, I want to calculate entropy contribution of a relatively huge protein (18574 atoms) binding with it's ligand. I used AMBER14 to perform this computation (AMBER16 was tested as well). The task stopped while calculating the normal mode of the first frame. The error information is: ~/software/amber14/bin/nmode -O -i nmode_com.in -o nmode_com.1.out -c sanmin_com.1.restrt -p ./com_nobox.prmtop not running properly
For details see: http://ambermd.org/Questions/mm_pbsa.html#calc_NM_entropy_not_running_properly
Then I open nmode_com.1.out and see: *******************************************************
Initiate the NMODE module of AMBER 8
*******************************************************
File generated by mm_pbsa.pl
ntrun maxcyc ibelly drms
1 100 0 0.50E+01
rcut scnb scee dielc idiel
99.00000 2.00000 1.20000 4.00000 0
nsave dfpred bdwnhl smx emx alpha ndiag
20 0.01000 0.10000 0.08000 0.30000 0.80000 10
ipol = 0
i3bod = 0
idecomp = 0
nvect = 0
Binary format used for input coords.
| New format PARM file being parsed.
| Version = 1.000 Date = 01/16/17 Time = 12:55:04 PARM file has the title:
default_nameTotal memory required : -1749912621 real wordsTotal memory required : 175055910 integer wordsTotal memory required : 57116 4-character wordsMaximum nonbond pairs 173752760 Normal mode calculation stopped at this point and no further updates were found. Is this problem caused by the requirement of a huge memory? Have anyone meet this problem before? Looking forward your help. Thanks in advance. Regards,Wei--------------------------------
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Received on Thu Feb 09 2017 - 04:30:02 PST
