Hi all, I am having a problem trying to show salt bridges between selected atoms in a movie of my pdb format trajectory. I am using the following commands in the Per-Frame script, to display H-bonds between the residues but with a less strong distance criterion (to bring the distance of interaction to 6 A) and angle criterion (to make the angle 0deg and so make all angles available): select :1,6,7,10,16,18 findhbond selRestrict :1@HZ1,HZ2,HZ3 :6@2HH2,2HH1,HE,2HH1,1HH1 :7@O3P,O2P,O1P :10@HZ1,HZ2,HZ3 :16@HZ1,HZ2,HZ3 :18@2HH2,2HH1,HE,2HH1,1HH1 linewidth 2 reveal true relax true distSlop 2.97 angleSlop 145 When I apply this script I get a Chimera error saying: Error while sourcing select :1,6,7,10,16,18 findhbond selRestrict :1@HZ1,HZ2,HZ3 :6@2HH2,2HH1,HE,2HH1,1HH1 :7@O3P,O2P,O1P :10@HZ1,HZ2,HZ3 :16@HZ1,HZ2,HZ3 :18@2HH2,2HH1,HE,2HH1,1HH1 linewidth 2 reveal true relax true distSlop 2.97 angleSlop 145 ,line 1: "findhbond selRestrict :1@HZ1,HZ2,HZ3 :6@2HH2,2HH1,HE,2HH1,1HH1 :7@O3P,O2P,O1P :10@HZ1,HZ2,HZ3 :16@HZ1,HZ2,HZ3 :18@2HH2,2HH1,HE,2HH1,1HH1 linewidth 2 reveal true relax true distSlop 2.97 angleSlop 145" Non-alphanumeric character in keyword ':6@2HH2,2HH1,HE,2HH1,1HH1' I have tried tweaking it different ways but just get other error messages, I can't seem to write it in the correct format. Can anyone see a problem with this script and how I might fix it? Cheers Albie