Here’s a simple example that puts a mesh at each point of an arc curve.
The PointReferenceFrame is a 3×3 matrix, so you have to extract the SRT to get the rotation.
I cheated by rotating the original object instead of applying an adjustment in the ICE Tree.
eX-SI 
thank you very much!!!
more of this “simple” examples would be so great… actually, thats what lets me always stuck on a point or i give up while crying in my pillow ^^. the “complex” stuff get discussed everywhere and tons of tutorials handle it.
but i was sitting 2 days on a pipeline thing coz of this rotations stuff, freaked out and started hating ICE, since i found this pic 🙂
lg