Occasionally people want to visualize the structure changes during a geometry optimization in Forcite. Whilst this is not an option of this task, it is straightforward to generate such trajectory output using scripting:

my \$doc = \$Documents{'5_5_capped.xsd'};
my \$maxIter = 100;

my \$forcite = Modules->Forcite;
\$forcite​​​​​​​->ChangeSettings([
   OptimizationAlgorithm => 'Steepest descent', MaxIterations => 10]);
my \$opt = \$forcite​​​​​​​->GeometryOptimization;
my \$xtd = Documents->New(\$doc->Name.'.xtd');
my \$trj = \$xtd->Trajectory;
for(1..\$maxIter)
{
   \$opt->Run(\$doc);
   \$trj->AppendFramesFrom(\$doc);
   printf "Potential Energy =   %f\n", \$doc->PotentialEnergy;
}

Here is an example of optimizing a nanotube subject to an angle restraint, forcing the tube to bend to 120 degree (restraints are available in the 5.5 release):

Reinier