From J_BROWN@uvmvax.uvm.edu  Mon Dec 28 04:52:00 1992
Date: Mon, 28 Dec 1992 09:52 EST
From: J_BROWN@uvmvax.uvm.edu
Subject: request help with MM2(87) dihedral angle drivers
To: chemistry@ccl.net
Message-Id: <01GSUFJOWRC0004E8U@uvmvax.uvm.edu>


Dear CCL'ers

I am having trouble doing several dihedral angle driver
calculations with MM2 (87). It seems that some of the
conformations that occur during the drivers cause MM2 (87)
to stop and the VMS/VAX reports a FORTRAN "divide 
by zero error". I can sometimes get around the problem by
slightly altering the starting point of the driver, thus
skipping the "bad" dihedral angles, but this does not always
work. Has anyone else encountered this problem. Is there a
"quick fix". Is there a way that I can tell MM2 (87) to
skip that point and go on to the next as apposed to
just stopping.

                               Many Thanks,

                               Jay Brown
                               j_brown@uvmvax.bitnet