Not able to retarget motion using ART in Maya

Development Rendering
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Hi,
I am not able to retarget ue exported

338108-art-retarget03.jpg
338108-art-retarget03.jpg2503×1354 271 KB

animations in maya using ARTv1 onto mannequin. Tried with fresh installation with maya 2019.3 and 2020.3 as well. I am able to import skeleton with animation but not able to retarget that animation onto the rig. Sharing screenshot of the process.

Any suggestions would be a great help!

Thanks
Mani