i got an error while loading the plug in. Isn't it compatible with the newest version? Can you please comment on the following? glut_med1_r_X1_on_ground glut_med1_r_Y1_on_ground glut_med1_r_Z1_on_ground glut_med1_r_X2_on_ground glut_med1_r_Y2_on_ground glut_med1_r_Z2_on_ground what does X1, X2 denote?