diff --git a/DESCRIPTION b/DESCRIPTION
index 8b91a845371b21e775ce5c90660b9632e9bc5756..3ff15b502db029a3f3b8113f9a387d76cc0ae78b 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,7 +1,7 @@
 Package: airGR
 Type: Package
 Title: Suite of GR Hydrological Models for Precipitation-Runoff Modelling
-Version: 1.2.13.10
+Version: 1.2.13.11
 Date: 2019-04-03
 Authors@R: c(
   person("Laurent", "Coron", role = c("aut", "trl"), comment = c(ORCID = "0000-0002-1503-6204")),
diff --git a/NEWS.rmd b/NEWS.rmd
index e5b02f434064a45558c20961ae3d6f583232c554..1506460c40a03322ea3f12776cd32eca8011776e 100644
--- a/NEWS.rmd
+++ b/NEWS.rmd
@@ -13,7 +13,7 @@ output:
 
 
 
-### 1.2.13.10 Release Notes (2019-04-03)
+### 1.2.13.11 Release Notes (2019-04-03)
 
 
 
diff --git a/R/Utils.R b/R/Utils.R
index e8c2ef4c6048f93d4376c9bda34ad212ea22c641..33106630a7fa749c683c52742adb5cf821d1768f 100644
--- a/R/Utils.R
+++ b/R/Utils.R
@@ -1,4 +1,16 @@
 
+## =================================================================================
+## function to check
+## =================================================================================
+
+# .onLoad <- function(libname, pkgname){
+#   if (requireNamespace("airGRteaching", quietly = TRUE)) {
+#     if (packageVersion("airGRteaching") %in% package_version(c("0.2.0.9", "0.2.2.2", "0.2.3.2"))) {
+#       packageStartupMessage("In order to be compatible with the present version of 'airGR', please update your version of the 'airGRteaching' package.")
+#     }
+#   }
+# }
+
 
 ## =================================================================================
 ## function to manage Fortran outputs
diff --git a/man/BasinObs.Rd b/man/BasinObs.Rd
index 1c44a6a77fd6753a8889eef15ea2e1c50bbb8f44..edfa60bd2b25a52b315e53d2e39f9b7b9b36ea39 100644
--- a/man/BasinObs.Rd
+++ b/man/BasinObs.Rd
@@ -22,7 +22,7 @@ The flows are provided by Electricity of France (EDF) and were retrieved from th
 The meteorological forcing are derived from the SAFRAN reanalysis from Météo-France (Vidal et al., 2010).
 \cr
 R-object containing the times series of precipitation, temperature, potential evapotranspiration and discharge. 
-X0310010 contains in addition MODIS snow cover area (SCA) data retrieved from the National Snow and Ice Data Center (NSIDC) repository (https://nsidc.org/). Five SCA time series are given, corresponding to 5 elevation bands of the CemaNeige model (default configuration). Missing values correspond to important cloudiness over the bands.
+X0310010 contains in addition MODIS snow cover area (SCA) data retrieved from the National Snow and Ice Data Center (NSIDC) repository (https://nsidc.org/). Five SCA time series are given, corresponding to 5 elevation bands of the CemaNeige model (default configuration). SCA data for days with important cloudiness (> 40 \%) were set to missing values for the sake of data representativeness. .
 \cr \cr
 Times series for L0123001, L0123002 and X0310010 are at the daily time step for use with daily models such as GR4J, GR5J, GR6J, CemaNeigeGR4J, CemaNeigeGR5J and CemaNeigeGR6J. \cr
 Times series for X0310010 are provided in order to test hysteresis version of CemaNeige (see \code{\link{CreateRunOptions}} (Riboust et al., 2019). \cr