Error when using output-efficiency orientation together with variable returns to scale.

[mcf-rocha]

> executa(orientacaoDaEficiencia=2)

Error in seq.default(a, b, length = gridsize) :
'from' cannot be NA, NaN or infinite In addition: Warning messages:
1: In min(x, na.rm = na.rm) :
no non-missing arguments to min; returning Inf
2: In max(x, na.rm = na.rm) :
no non-missing arguments to max; returning -Inf