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Issue adding top compression plate after packing stabilization

Hello Everyone,

I am working on a YADE simulation involving a mixture of sand and rubber particles inside a cylindrical container. The goal is to allow the particles to settle and then automatically generate a top compression plate that applies a vertical load.

The issue I am facing is that the particles are generated correctly, but the compression plate never appears during the simulation. Can this issue be because the particles are not reaching a stable or balanced state, and thus the plate creation condition never executes. Also, is there a specific way in YADE to help achieve the sample a predefined porosity after particles get stabilized.

Please find attached the MWE for this.

MWE.py

Could you please help me identify the possible reasons behind this response?