i’m doing the hierarchy tutorial (solar system) from ingiebee’s site and I am running up against a problem. when i go to the ipo window the rotz curve for the the “earth” orbit nor the lunar orbit shows up. It appears as a strait line even though the frame locater appears in the correct position.
BTW i’m on linux rh 7.3 using 2.25 blender
If your planets do rotate when you Alt+a in the 3d window then it should be there. You can move the graph around holding the middle mouse button down, and zoom in etc, make sure you’re at the start of the graph. Also there are type of graph icons below in that window, make sure you’re on the right one, ipo not path or anything else.
got it! 
much thanks