Hello

I have a problem with gmx hbond command. I use this command that available in gromacs documentation"14]gmx hbond -s md-ir.tpr -f md-ir-trj.xtc -num hbnum-apc3-ir.xvg -dist hbdist-apc3-ir.xvg -ang ang-apc3-ir.xvg -ac apc3-ir.xvg -dan dan-apc3-ir.xvg -hbn hbond-apc3-ir.ndx -hbm hbmap-apc3-ir.xpm -g hbond-apc3-ir.log -life hblif-apc3-ir.xvg" but .xmp file did not generate. how can I solve this problem?

thanks