How can i store pointPositions at the beginning of the sim

[biOss]

Hi there,
Is there a diffrences between polyMesh points and point cloud points? It seems it does.
I 've triying to deform a grid with a Cube object and "Test inside Geomety" node. When a point on the grid inside of the deformer cube object, ICE simply adds a value, which is 0,1,0 value multiplied by simulation step, to that point. When that point outside of that deformer cube object I want grid point turn back to their first position. I can make that setup with pointCloud grid.
There is a "Emit Position" node for storing first position of Point Cloud. But with polymesh object it doesn't work.
So I try to manually store the first position of the polymesh grid object with that setup
"Get Point Position"--> "Set Point Position" --> "Execute Once". I assume that this node for that kind of operations. Saddly I couldn't success.
Then I dublicate the grid mesh and with "Switch Context" node I made some improvement on my setup.
Is there a way to store pointPositions of a mesh object at the begining of the simulation without adding a clone Mesh.

Here is the screenShot.
https://yadi.sk/i/Ujy1sNKWWqaLK

[xsisupport]

In the Modeling stack, store the point positions in an attribute.