diff --git a/DESCRIPTION b/DESCRIPTION
index 34d9f34b60ee2c416d94a551bb1f103b52d957e4..b07b949f9de91d7258efd30fae41f04de950f1d0 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,7 +1,7 @@
 Package: airGR
 Type: Package
 Title: Suite of GR Hydrological Models for Precipitation-Runoff Modelling
-Version: 1.1.2.28
+Version: 1.1.2.29
 Date: 2019-01-18
 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 75ccf96970008e91b364a2336f5f4ed6e4305c24..8159e5f4f8dd751c3f4a4e041a89da0953ee5f57 100644
--- a/NEWS.rmd
+++ b/NEWS.rmd
@@ -13,7 +13,7 @@ output:
 
 
 
-### 1.1.2.28 Release Notes (2019-01-18) 
+### 1.1.2.29 Release Notes (2019-01-18) 
 
 
 
diff --git a/R/SeriesAggreg.R b/R/SeriesAggreg.R
index c7fb15f53df20c4dc6e8481c682fd4e26c28ab47..17080f312f69bf53a86439f8d2a00280d8124f21 100644
--- a/R/SeriesAggreg.R
+++ b/R/SeriesAggreg.R
@@ -137,14 +137,14 @@ SeriesAggreg <- function(TabSeries,
   }
   TmpDatesR <- seq(from = TabSeries[1, 1], to = tail(TabSeries[, 1], 1), by = by)
   if (!identical(TabSeries[, 1], TmpDatesR)) {
-    stop("Problem detected in TabSeries dates vector (in comparison with seq(from=TabSeries[1,1],to=tail(TabSeries[,1],1))) \n")
+    stop("Some dates might not be ordered or are missing in TabSeries \n")
     return(NULL)
   }
   ##check_conversion_direction
   if ((TimeFormat == "daily"   & NewTimeFormat %in% c("hourly")                  ) |
       (TimeFormat == "monthly" & NewTimeFormat %in% c("hourly","daily")          ) |
       (TimeFormat == "yearly"  & NewTimeFormat %in% c("hourly","daily","monthly"))) { 
-    stop("only time aggregation can be performed \n")
+    stop("Only time aggregation can be performed \n")
     return(NULL)
   } 
   ##check_if_conversion_not_needed