AMBER: Xleap crash, problem with residue bonding

From: <>
Date: Thu, 22 Jul 2004 10:24:35 -0400
('binary' encoding is not supported, stored as-is)
Dear Amber community,

I am working with a star polymer that I am building in xleap, in Amber 7.
I have defined the residues and they have worked in xleap before.
When connecting the residues I xleap the following:
tmp1 = sequence {cen arm1}
set tmp1 tail tmp1.1.y
tmp2 = sequence {tmp2 arm2}
When doing this the pdb as well as the results of an MD simulation viewed
in MOIL-View had the residues NOT connected and they had drifted apart in
the simultion.
Therefore I tried to connect the residues by telling leap specifically to
bond the atoms in question by using the bond command:
bond tmp1.1.y tmp1.2.x
bond tmp1.1.y tmp1.3.x
bond tmp1.1.z tmp1.4.x
I am able to save the library file using the saveoff command (this file I
will attach), but when I try to save the prmtop and inpcrd file using
saveamberparm xleap crashes.
It gives me the following error:
!FATAL ERROR----------------------------------------
!FATAL: In file [unitio.c], line 1763
!FATAL: Message: 1-4: cannot add bond 25 77

Can somebody please tell me what this error means and what I have to do
differently to be able to save prmtop and inpcrd files from the lib file
Thank you very much in advance.


P.S.: The attached file is a *.lib file. This seemed to cause the e-mail
to unsendable, therefore I just changed the file extension to *.out to be
able to send it.

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Received on Thu Jul 22 2004 - 15:53:00 PDT
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