I am trying to model an FRP composite structure with embedded piezoelectric-semiconductor nanoparticles. The nanoparticles are highly anisotropic. I input the anisotropic stiffness matrix in material property and I got this error. How to solve this problem?

Furthermore, I am trying to input a mechanical load in the composite and extract the electrical potential data generated due to the piezoelectricity of the nanoparticles. I also wish to find the total stress-strain field of the composite. If this is possible to do in ABAQUS, please refer some readings to model this kind of composite.