FM for HU change item packed qty VEPO-VEMNG (as tcode HU02)

Dear Friends,

I am trying to indentify a FM that can update the packed qty of an HU(VEPO-VEMNG) in the same way like I would do it from transaction HU02. FM HU_ITEM_CHANGE doesn't work for this particular field (it works for others instead which is frustrating).

Can you please adivse?

Thanks and BR,

Cristian