So I did the sync sending MIDI OUT from the Analog Rytm to IN at the Octatrack, was working perfectly fine.
The machines was running together, so I was trying things on the octatrack and in some point I change the Tempo on the octatrack and loose the sync forever!
I cleaned the send/receive on the options of both machines, I did restart both, I try to change (reverse) for the octatrack send the midi clock in to the Analog Rytm, doesn’t working at all.