sliding atoms with AFM tip

Dear users,

I have been trying to move my graphene group with AFM tip using fix
spring command. Actually, I can not use fix smd command because my
executable is a little bit old. Also, I am not permitted to have a new
executable right now.

When I use the in file, no movement occurs for the group attached to AFM tip.

I am deeply appreciate any comment.

Best,

ipek