Nilesh Dhumal wrote:
I am using opls force field. I have solvent.itp file.
I added follwing line in my solvent.itp file.
[ constraints ]
 opls_997  opls_998   1    0.350000
I am getting the following error


You don't define constraints with atom types, you use atom numbers.  See
the manual.

Fatal error:
Syntax error - File solvent.itp, line 13
Last line read:
' [ constraints ]'
Invalid order for directive constraints


Then you've put it in the wrong place.  Like any other bonded term,
[constraints] belongs to the moleculetype to which the constraint is to
be applied.

-Justin

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

Justin A. Lemkul
Ph.D. Candidate
ICTAS Doctoral Scholar
MILES-IGERT Trainee
Department of Biochemistry
Virginia Tech
Blacksburg, VA
jalemkul[at]vt.edu | (540) 231-9080
http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin

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