Stiffness defined by engineering constants is not physically reasonable?

[IcarusAero223]

I calculated equivalent elastic properties of a honeycomb core using analytical Ashby & Gibson approach.
Material was defined using "Engineering Constants" submenu in elastic material properties section (with analitically calculated values).
After that I defined material orientation using local datum CSYS.

But running the simulation, an error occurs saying: "Stiffness defined by engineering constants is not physically reasonable. Check choice of poisson's ratios. Stiffness defined by engineering constants is not physically reasonable. The total work done by all strain components must be positive. Check choice of poisson's ratios".

I did an orthotropic stability condition check and none of the conditions were met. Then I did the same check for values found in other literature and there those conditions weren't met either.

Any help is greatly appreciated, THANKS!

Part geometry with local datum CSYS

Material properties window

 

[FEA way]

Then I did the same check for values found in other literature and there those conditions weren't met either.

And are they accepted by Abaqus ? Check with the data provided for the examples in the Abaqus documentation.

 

[SWComposites]

Set nu12 = 0.