Sorry I've been asking a lot of questions lately, just started using espresso and a lot of questions appear. I tried looking through the mailist archive but I don't think this one was asked.
In the manual there is a rigid_bond bonded interaction but it's without a description. I tried using it but i receive "unknown bonded interaction type "rigid_bond" ". So I was wondering if anyone has used rigid_bond before then what features I might need to enable to make it work? Also what exactly are positional tolerance and velocity tolerance in the definition of rigid_bond.