Thank you so much my friend! That was the case, the frames start/end was set to 0/1 and I had to change it to the number of frames of the animation and now it works, one issue I have is that there is a tiny difference between the first and last frame of the animation, Idk if I missed something about the export from UE4 part of the tutorial, where you change the translation retargetting. Now this another problem I have not related to BoneBreaker but if you or anybody can help me I would be greatful, when I did the bone translation retargetting in Unreal the animation gets broken, the left hand joint gets out of place as you can see in screenshot below, so I had to revert it to the previous settings. At last, I have another issue, as soon as I click the UE4 button on the Rig Actions Tab, the animation gets broken, the target bones get rotating around. Any idea what may have caused this? Again my friend I’m very greatful and appreciate your time and effort helping us, stay strong! 