Hi,
I think the MAXCHN "errors" has been "fixed" in recent versions of CNS.
You must be using CNS v1.0 or v1.1.
So either you download and install a recent version (the latest is
v1.3), or you do as the error message suggests: you edit your anneal.inp
file, you locate "MAXCHN=" or "MAXCHN =" (or "maxchn=" or "maxchn =" -
can't tell you which one since I have removed previous versions of CNS
on my workstation) and you increase the figure after the = sign.
I cannot remember if the topology error message is related to the
problem with an insufficient number of chains set in the input file.
HTH,
Fred.
Hussain Bhukyagps wrote:
Hi,
I'm facing problem in refinement.
i have a pdb and it is showing the following error in the step of
annealing.
-------------------------- Torsion Topology
------------------------------
-----
ERROR: A tree has too many chains.
Please increase MAXCHN and re-run.
%TORSION:TOPOLOGY error encountered: Fatal Topology Error
(CNS is in mode: SET ABORT=NORMal END)
*****************************************************
ABORT mode will terminate program execution.
*****************************************************
