Model failed to converge with max|grad| = 0.0540203 (tol = 0.001, component 37)
Model failed to converge: degenerate  Hessian with 2 negative eigenvalues

Model failed to converge with max|grad| = 0.0469632 (tol = 0.001, component 38)

Model is nearly unidentifiable: very large eigenvalue
 - Rescale variables?

Model is nearly unidentifiable: large eigenvalue ratio
 - Rescale variables?