appending a trajectory

Dear all,

i want to concatenate two trajectories. these are created with the reaction preview tool.

Doing something like

my \$one = \$Documents{"part1.xtd"};
my \$two = \$Documents{"part2.xtd"};

\$one->Trajectory->AppendFramesFrom(\$two->Trajectory);

makes MS crash.

Documentation says that with AppendFramesFrom and InsertFramesFrom, Frames can only be inserted into a trajectory with a TrajectoryType of trj. How do I convert trajectory files to trj?

thanks!

Martin