Error: odeint not implemented!

Dear all,
I am a new user and I am currently using OGS5.7 (downloaded at this link OpenGeoSys-5) I’m actually following the tutorial of the book: OpenGeoSys Tutorial Computational Hydrology II: Groundwater Quality Modeling.
When I execute the code, I have encountered the following problem:

 ExecuteKineticReactions
Error: odeint not implemented!
Warning in CKinReactData::Biodegradation: Odeint did not converge at node 0.
   -Trying increased relative error 1e-05
Error: odeint not implemented!
  -Trying perturbation of initial time step usedt
Error: odeint not implemented!
   -Trying conversion of C vector from double to float.
Error: odeint not implemented!
   -Trying perturbation of concentration vector by 1 per mil
Error: odeint not implemented!
   -Trying increased relative error 0.0001
Error: odeint not implemented!
  ODE integration finally failed. Skipping this node.

I have also tried to execute the tutorial 1d_xylene_degradation available on-line but i encounter the same error.
Does anyone know what does it means and how to fix this problem?

Thank you in advance,

Andrea