From qibvigap@lgdx02.lg.ehu.es  Sat Oct  5 05:57:07 1996
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Date: Sat, 5 Oct 1996 11:11:52 +0000
To: chemistry@www.ccl.net
From: qibvigap@lgdx02.lg.ehu.es (Pablo Vitoria)
Subject: Error message in AIM calculation in G94



Dear colleagues,

While doing an AIM (Atoms in Molecules) calculation for pyridazinium cAtion
with the program G94, the following error message appeared when the program
was trying to locate the 6-membered ring critical point:

>>> Irreparable ring damage: the gap cannot be bridged
>>> Error termination via Lnk1e in /usr/local/g94/l609.exe.

The funny thing is that in a identical calculation with pyrazinium there
was no problem at all in locating the ring point.

Any suggestions about which the cause of this error may be?

Thank you very much for your help

Pablo Vitoria

--------------------------------------------------------------------------------
Pablo Vitoria Garcia
Departamento de Quimica Inorganica, Facultad de Ciencias
Universidad del Pais Vasco (UPV/EHU)
Apartado 644, E-48080 Bilbao
SPAIN
e-mail: qibvigap@lgdx02.lg.ehu.es
Phone: +34 4 4647700 Ext. 2450
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From ccl@www.ccl.net  Sat Oct  5 16:57:13 1996
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To: chemistry@ccl.net
From: Jeffrey J Ayres <JeffAyres@postoffice.worldnet.att.net>
Subject: Re:PDB format
Date: Sat, 5 Oct 1996 20:43:12 +0000
Message-ID: <19961005204310.AAA8693@LOCALNAME>


Attn: M. Dooley,
        In response to your question dated Sept. 2, 1996.  CAVEAT, or
Verification/Validation/Value Control Authority is used to indicate entries
known to be incorrect.  The information is added by the PDB.
        For help with the exact format of a NMR pdb file, format
descriptions should be available at the pdb internet site.  Previous
experience was successful in locating the exact format requirements of x-ray
crystal pdb file format.  Sorry can't be of more help.
Jeff Ayres


