I've copied geometry to the points of a wire coming from DOPs. The geometry copies fine but I can't get the geometry to orient itself according to the point normal on the wire points (set to the tangentu).

It seems like a perfect solution for the SOP Solver but I couldn't get that to work. Any advice would be much appreciated. Specifically I don't think I understand what DOPs is doing to the point normals or why I can't reset them to the wire tangent coming from DOPs?

Thanks, Kevin

&- test file attached

It's because the output curve has the “orient” attribute. When the Copy SOP sees the “orient” attribute, that attribute has precedence over the N and up attributes. That's why there's no effect when you tried to change the N and up attributes. So if you want to control the orientation with N and up, you'd have to delete the “orient” attribute. This page describes the rules for the copying:
http://www.sidefx.com/docs/houdini14.0/copy/instanceattrs [sidefx.com]

Thanks Andrew. Much appreciated. That page is exactly what I needed.
Kevin