Problem with 'moments_varendo'

Dear all

One of the options from the ‘estimation’ command, moments_varendo, does not seem to work now with version 4, if I include this option in the estimation, I get the error:

??? Undefined function or method ‘PosteriorMomentsVarendo’ for input arguments of type ‘char’.

To my best knowledge, it used to work well with version 3.

Does anyone know why? How would I now compute the posterior moments (including the variance decomposition) if this option is not implementable?

Many thanks!