Dear firedrakers,

I am trying to use a simple finite strain model based on the use of the Green-Lagrange tensor. Unfortunately, I get a strange error :

KeyError: 'Object with key a9198fc8d1d6100862060f0212858a83 not found'

Am I missing something? Everything is OK when using the linear strain tensor.

The script is attached to this email.

Thanks for your help,

Nicolas