On 1/19/14, 11:16 AM, Albert wrote:
Hello:
I am running command: grompp -f sample.mdp -c merge.pdb -p topol.top -o
input.tpr -n

but it failed with following messages:


NOTE 1 [file sample.mdp]:
   Setting nstcalcenergy (100) equal to nstenergy (50)


NOTE 2 [file sample.mdp]:
   nstcomm < nstcalcenergy defeats the purpose of nstcalcenergy, setting
   nstcomm to nstcalcenergy

Generated 71623 of the 71631 non-bonded parameter combinations
Generating 1-4 interactions: fudge = 1
Generated 45719 of the 71631 1-4 parameter combinations

ERROR 1 [file topol.top, line 23560]:
   No default U-B types


Google knows about dozens of posts about this error. The list is archived for a reason!

-Justin

--
==================================================

Justin A. Lemkul, Ph.D.
Postdoctoral Fellow

Department of Pharmaceutical Sciences
School of Pharmacy
Health Sciences Facility II, Room 601
University of Maryland, Baltimore
20 Penn St.
Baltimore, MD 21201

[email protected] | (410) 706-7441

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