EDIT::
Juist found in manual:


<<This variable must be set at the beginning of the main script before level loading.>>

SO:
I guess i will have to open engine with null, Init the vars and then load my level.
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Will let you know.
Or you could try calling it (enable_polycollision) in the EngineInForm sample ( in IEnumerable MainFunction() ) to see the error.
So it seems now it is not an error in the wrapper.
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ALL is good.