in previous versions of CalculiX (CCX v2.12) coupling type distributing works properly for any load type including concentrated forces and moment/torque. however it seems some code has modified by developer, it did not work anymore for all loading types.
i tested with current version of CCX (v2.19) also. unfortunately, it’s only work for concentrated forces and not for moment/torque.
attached a simple example of PMX files for those who interested to test.
due to some limitation as observed, *Distributing Coupling keywords and element type Dcoup3D could be used for implementation in PrePoMax before *Coupling type Distribution is fixed and working properly. it will eliminate a user to strictly use for displacement or concentrated forces only.