ABAQUS HELP! Problem with implementation of Hyperelastic Anisotropic user subroutine module

Hello,

I'm trying to model human skin with a user defined Strain Energy Density using "vuanisohyper_inv" subroutine.

I have attached the user subroutine fortran code. In the CAE, I specify Hyperelastic + Anisotropy with

Strain Energy potential: User

Formulation: Invariant

Incompressible

Number of field variables : 0

Number of local directions : 1

Number of property values : 2

When I run the Data check, I get an error

THERE ARE INVALID DATA ASSOCIATED WITH THIS USER DEFINED ANISOTROPIC HYPERELASTIC MATERIAL DEFINITION

Can someone please help me debug this problem?

Thanks 

Avinash