Patch Replacer Bug ?

I am trying new version 15 of davinci... and trying the new Patch replacer OFX .
I am trying to clone something in a clip , i add the patch replacer OFX on a node, i make the right adjustments , i go to tracker window and choose FX but when i try to track the patch , davinci says... There is no live features to track !

Is this a bug or am i doing something wrong ?

[Peter Chamberlain]

In FX tracker u need to add a tracking point. Bottom of tracker window then position on viewer

In FX tracker u need to add a tracking point. Bottom of tracker window then position on viewer

Thank you Peter, not even the user manual mentioned the damn "tracking point"