Thank you for answering my call 
No I could not write it in equation, I do not have the knowledge for that.
But…
After having tried I modified the termination of my assembly and added a calculation between the «Rst NS 4» the Max n. Solid, so that if the RST NS 4 is larger than The portable maximum this one is subtracted from the Rst NS4.
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although I unfortunately do not understand where he came from. I will look again, to understand.
Thank you Nawrot for your help I learned a lot from your example.