Levi-Civita tensors (Eps) of different ranks cannot be used simultaneously

[LSartore]

The current implementation of the Eps tensor prevents the user to use Levi-Civita tensors of different ranks in a single model file.
For instance, using Eps[i,j] and Eps[a,b,c] in the same model file will generate an error message.

A possible workaround for implementing the rank-3 Levi-Civita tensor independently of e.g. Eps[i,j] consists in using the structure constants of SU(2). For instance, in the Definitions section of the model file, one can write

Definitions: {
    auxEps : t(SU2, 3),
    Eps3[i,j,k] : I * auxEps[i,j,k]
}

to obtain the rank-3 Levi-Civita tensor Eps3. Note that this solution will only work if the option RealBasis : all (default) or RealBasis : adjoint is included in the default.settings file.