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[behzad <question261724@xxxxxxxxxxxxxxxxxxxxx>]

Question #261724 on Yade changed:
https://answers.launchpad.net/yade/+question/261724

behzad posted a new comment:
I don't get any error message or crash!

But, the force-displacement law is not following the analytical response
and actually the two contacting spheres pass through each other by even
a very small force.

When I ask for properties of the interaction like
O.interactions[0,1].phys.kmn

it gives ;
AttributeError: 'NoneType' object has no attribute 'kmn'


but if I ask few steps after, it gives the right answer as:

Yade [4]: O.interactions[0,1].phys.kmn
 ->  [4]: 61538461.538461536

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