<html><head></head><body><div class="ydpe65769e0yahoo-style-wrap" style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:16px;"><div>Hello</div><div><br></div><div>I am trying to find the RMSD between docked ligand and original ligand but I am not able to do it. When i tried the command "match" it showed the error atom spec missing. Can you please tell me how to fix this problem?</div><div><br></div><div>Thank you </div></div></body></html>