I just installed monocle package to analyze some data. When I ran the example in package which names "HSMM_analysis.R" to learn to use monocle, Rscript reported a bug:

Error in argfun(start + i - 1L) : 
  no slot of name "expressionFamily" for this object of class "CellDataSet"

My environment as follow:

R version 3.2.2 (2015-08-14) -- "Fire Safety"
Copyright (C) 2015 The R Foundation for Statistical Computing
Platform: x86_64-w64-mingw32/x64 (64-bit)