I think this message simply means that you have reached a local
energy minimum. The search is abandoned when the norm of the gradient of
Etotal has become smaller than the TOLGradient value (probably the default
value in your case). Have a look to the evolution of grad(E) at the end of
your .out file.
CNRS UPR 9004 Biologie Structurale
>Dear X-Plor users,
>>when I'm trying to minimize protein structures (models and NMR structures
>using constraints) some minimizations abort with the message 'line search
>abandoned'. Has anybody ever come across this? Any idea what's going wrong?
>the problem occurs with X-Plor 3.1 and 3.843.
>>Thanks a lot in advance!
>>>Dr Ruth Boetzel
>School of Chemical Sciences
>University of East Anglia
>E-Mail: r.boetzel at uea.ac.uk