diff --git a/DESCRIPTION b/DESCRIPTION
index 84ff7b7522698023e913a2afcfc7e3a69c97d62e..e82d11ffc958729d401453a528dfde94afcba9f0 100755
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,8 +1,8 @@
 Package: hydroPSO
 Type: Package
 Title: Model-Independent Particle Swarm Optimisation for Environmental Models
-Version: 0.1-58-30
-Date: 2012-11-26
+Version: 0.1-58-31
+Date: 2012-11-27
 Authors@R: c(person("Mauricio", "Zambrano-Bigiarini", email="mzb.devel@gmail.com", role=c("aut","cre")), person("Rodrigo", "Rojas", email="Rodrigo.RojasMujica@gmail.com", role=c("ctb")) )
 Maintainer: Mauricio Zambrano-Bigiarini <mzb.devel@gmail.com>
 Description: This package implements a state-of-the-art version of the Particle Swarm Optimisation (PSO) algorithm (SPSO-2011 and SPSO-2007 capable), with a special focus on the calibration of environmental models. hydroPSO is model-independent, allowing the user to easily interface any model code with the calibration engine (PSO). It includes a series of controlling options and PSO variants to fine-tune the performance of the calibration engine to different calibration problems. An advanced sensitivity analysis function together with user-friendly plotting summaries facilitate the interpretation and assessment of the calibration results. Bugs reports/comments/questions are very welcomed.
diff --git a/inst/vignette/hydroPSO_vignette.Rnw b/inst/vignette/hydroPSO_vignette.Rnw
index c0be0ff3b816f31c51871d977eac9db866489e1c..e3b01eb8c15c35c257168586e503aec40310246f 100644
--- a/inst/vignette/hydroPSO_vignette.Rnw
+++ b/inst/vignette/hydroPSO_vignette.Rnw
@@ -1,5 +1,5 @@
-\documentclass[a4paper,12pt]{article}
-%\documentclass[a4paper,12pt]{scrartcl}
+%\documentclass[a4paper,12pt]{article}
+\documentclass[a4paper,12pt]{scrartcl}
 
 \author{Rodrigo Rojas, PhD \\
         Mauricio Zambrano-Bigiarini, PhD}
@@ -501,10 +501,10 @@ n             parn          minn     maxn
 
 \begin{enumerate} 
 
-\item Use next commands to retrieve current working directory, set a new working directory, and printing files included in the current directory, respectively.
+\item In the R console, use next commands to retrieve current working directory, set a new working directory, and list the files included in the new working directory, respectively.
 <<eval=FALSE>>=
 getwd()
-setwd("~/tmp")
+setwd("~")
 list.files(".")
 @
 
@@ -709,7 +709,8 @@ From the previous results we see that the regrouping strategy allows particles e
 
 <<eval=TRUE>>=
 setwd("./PSO.out.rastr")
-conv <- read_convergence(do.png=TRUE,png.fname="ConvergenceMeasuresRG.png")
+conv <- read_convergence(do.png=TRUE,
+                    png.fname="ConvergenceMeasuresRG.png")
 @