Simulating a single particle from the origin.

[Tatsu]

So I've added an empty point cloud object to my scene and added an ICE Tree to that object. Within the ICE tree, I've added an Emit from Position node, an Add Forces node, a Simulate Particles node and a 3D Vector node.
http://www.rmramirez.com/img/ICE/single_emit_tree.jpg
The emitter node is set to Total Number of Particles and the rate is set to 1. Direction and speed are zero.
In the Add Forces node, I have X and Y both at 1.

I expect when I run the simulation that the single particle will fly off in the X and Y directions, however my little particle just sits there vibrating at the origin. It appears to move for about 2 or 3 frames before resetting itself at the origin. I was hoping to play around with some ICE nodes and I figured this is the simplest possible set up but apparently I broke it early. Possible bug?? Or am I just doing something so obviously wrong I'm not seeing it?

[Stereo]

i dont know what the difference is in Create -> "ICE Tree" and "Simulated ICE Tree",
it does the same for me if i use "ICE Tree", but works if i use "Simulated ICE Tree"...

[ThE_JacO]

ICE trees are realtime operators with no time considered in the execution.
Simulated ICE trees are what you're supposed to use for anything where time is important, as they set an initial state and then simulate the current frame after looking up the previous one, where non simulated just run whatever tree in the current frame.

Your tree is in the modelling stack, which means it's not a simulated one (those will create their own entry point right below ssa).

Use a simulated ice tree and you'll be fine.

[Tatsu]

Ahh see.... something simple. Thanks.