diff --git a/.Rbuildignore b/.Rbuildignore
index 794a039..272d789 100644
--- a/.Rbuildignore
+++ b/.Rbuildignore
@@ -3,4 +3,5 @@
 ^data-raw$
 ^draft$
 ^NEWS$
-^cran-comments.md$
\ No newline at end of file
+^cran-comments.md$
+^revdep$
diff --git a/.gitignore b/.gitignore
index c4a8ce8..4b6d732 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,3 +3,4 @@
 .RData
 /drafts/*
 inst/doc
+/revdep/.cache.rds
diff --git a/DESCRIPTION b/DESCRIPTION
index 57e2895..30aeb58 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,7 +1,7 @@
 Package: aVirtualTwins
 Type: Package
 Title: Adaptation of Virtual Twins Method from Jared Foster
-Version: 1.0.0.9000
+Version: 1.0.1
 Date: 2016-10-09
 Authors@R: person("Francois", "Vieille", email = "vieille.francois@gmail.com",
   role = c("aut", "cre"))
@@ -18,7 +18,8 @@ Imports:
 Suggests:
     caret,
     knitr,
-    rpart.plot
+    rpart.plot,
+    rmarkdown
 Depends:
     R (>= 3.2.0),
 Collate:
@@ -42,4 +43,4 @@ Collate:
     'tree.reg.R'
     'tree.wrapper.R'
 VignetteBuilder: knitr
-RoxygenNote: 5.0.1
+RoxygenNote: 6.0.1
diff --git a/NEWS b/NEWS
index 4aeffce..2d8fc05 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,10 @@
+aVirtualTwins 1.0.1 (2018-01-30)
+----------------------------------------------------------------
+
+* Fix CRAN warning : CRAN packages using undeclared packages in vignettes
+* waiting for submission approval
+
+
 aVirtualTwins 1.0.0.9000 (2016-10-10)
 ----------------------------------------------------------------
 
diff --git a/cran-comments.md b/cran-comments.md
index ee3e4f2..9ebf9bc 100644
--- a/cran-comments.md
+++ b/cran-comments.md
@@ -1,3 +1,32 @@
+This is the second submission
+
+----------------------------------------------------------------
+
+## v1.0.1 : patch to cran warning:
+
+>CRAN packages using undeclared packages in vignettes
+
+`rmarkdown` seems to be the issue. Added rmarkdown to suggest field.
+
+## Test environments
+
+* Linux, Debian jessie, R 3.4.3
+* win-builder (devel and release)
+
+
+## R CMD check result
+
+Status: OK
+
+R CMD check results
+0 errors | 0 warnings | 0 notes
+
+
+
+
+
+
+
 This is the first submission
 
 ----------------------------------------------------------------
diff --git a/man/VT.difft.Rd b/man/VT.difft.Rd
index 36ce963..48392e7 100644
--- a/man/VT.difft.Rd
+++ b/man/VT.difft.Rd
@@ -33,13 +33,14 @@ So \emph{absolute} method is :
 
 \item{\code{difft}}{vector of difference between twin1 and twin2}
 }}
+
 \section{Methods}{
 
 \describe{
 \item{\code{computeDifft()}}{Compute difference between twin1 and twin2. See details.}
 }}
+
 \seealso{
 \code{\link{VT.forest}}, \code{\link{VT.forest.one}},
   \code{\link{VT.forest.double}}
 }
-
diff --git a/man/VT.forest-abstract.Rd b/man/VT.forest-abstract.Rd
index 0dcffce..6765e38 100644
--- a/man/VT.forest-abstract.Rd
+++ b/man/VT.forest-abstract.Rd
@@ -14,6 +14,7 @@ An abstract reference class to compute twin via random forests
 \describe{
 \item{\code{...}}{see fields of \code{\link{VT.difft}}}
 }}
+
 \section{Methods}{
 
 \describe{
@@ -23,7 +24,7 @@ An abstract reference class to compute twin via random forests
 
 \item{\code{run()}}{Compute twin1 and twin2 estimation. Switch treatment if necessary.}
 }}
+
 \seealso{
 \code{\link{VT.difft}}, \code{\link{VT.forest.one}}, \code{\link{VT.forest.double}}
 }
-
diff --git a/man/VT.forest.double.Rd b/man/VT.forest.double.Rd
index 8b49bc4..79d7955 100644
--- a/man/VT.forest.double.Rd
+++ b/man/VT.forest.double.Rd
@@ -31,6 +31,7 @@ This is what \code{computeTwin2()} does.
 
 \item{\code{...}}{field from parent class : \code{\link{VT.forest}}}
 }}
+
 \section{Methods}{
 
 \describe{
@@ -38,8 +39,8 @@ This is what \code{computeTwin2()} does.
 
 \item{\code{computeTwin2()}}{Compute twin2 by the other part of data in the other forest. See details.}
 }}
+
 \seealso{
 \code{\link{VT.difft}}, \code{\link{VT.forest}},
   \code{\link{VT.forest.one}}
 }
-
diff --git a/man/VT.forest.fold.Rd b/man/VT.forest.fold.Rd
index 32c4fa3..f00c339 100644
--- a/man/VT.forest.fold.Rd
+++ b/man/VT.forest.fold.Rd
@@ -28,13 +28,14 @@ interactions}
 
 \item{\code{...}}{field from parent class : \code{\link{VT.forest}}}
 }}
+
 \section{Methods}{
 
 \describe{
 \item{\code{run()}}{Compute twin1 and twin2 estimation. Switch treatment if necessary.}
 }}
+
 \seealso{
 \code{\link{VT.difft}}, \code{\link{VT.forest}}, 
   \code{\link{VT.forest.one}}, \code{\link{VT.forest.double}}
 }
-
diff --git a/man/VT.forest.one.Rd b/man/VT.forest.one.Rd
index e9e4005..0227c31 100644
--- a/man/VT.forest.one.Rd
+++ b/man/VT.forest.one.Rd
@@ -24,6 +24,7 @@ what \code{computeTwin1()} and \code{computeTwin2()} functions do.
 
 \item{\code{...}}{field from parent class : \code{\link{VT.forest}}}
 }}
+
 \section{Methods}{
 
 \describe{
@@ -31,7 +32,7 @@ what \code{computeTwin1()} and \code{computeTwin2()} functions do.
 
 \item{\code{computeTwin2()}}{Compute twin2 by switching treatment and applying random forest model}
 }}
+
 \seealso{
 \code{\link{VT.difft}}, \code{\link{VT.forest}}, \code{\link{VT.forest.double}}
 }
-
diff --git a/man/VT.object.Rd b/man/VT.object.Rd
index a4c1f76..c211f69 100644
--- a/man/VT.object.Rd
+++ b/man/VT.object.Rd
@@ -33,6 +33,7 @@ treatments.}
 \item{\code{type}}{Character : binary or continous. Only binary is currently 
 available.}
 }}
+
 \section{Methods}{
 
 \describe{
@@ -53,6 +54,7 @@ If trt is not NULL, return predictors for T = trt}
 
 \item{\code{switchTreatment()}}{Switch treatment value.}
 }}
+
 \examples{
 \dontrun{
 # Default use :
@@ -78,4 +80,3 @@ vt.o$getIncidences()
 \seealso{
 \code{\link{VT.difft}}
 }
-
diff --git a/man/VT.predict.Rd b/man/VT.predict.Rd
index 1c7a49b..e157a41 100644
--- a/man/VT.predict.Rd
+++ b/man/VT.predict.Rd
@@ -3,10 +3,10 @@
 \docType{methods}
 \name{VT.predict}
 \alias{VT.predict}
-\alias{VT.predict,RandomForest,data.frame,character-method}
 \alias{VT.predict,RandomForest,missing,character-method}
-\alias{VT.predict,randomForest,data.frame,character-method}
+\alias{VT.predict,RandomForest,data.frame,character-method}
 \alias{VT.predict,randomForest,missing,character-method}
+\alias{VT.predict,randomForest,data.frame,character-method}
 \alias{VT.predict,train,ANY,character-method}
 \alias{VT.predict,train,missing,character-method}
 \title{VT.predict generic function}
diff --git a/man/VT.tree-abstract.Rd b/man/VT.tree-abstract.Rd
index ac7121b..d6bedb7 100644
--- a/man/VT.tree-abstract.Rd
+++ b/man/VT.tree-abstract.Rd
@@ -52,6 +52,7 @@ screening field}
 
 \item{\code{Ahat}}{vector Indicator of beglonging to Ahat}
 }}
+
 \section{Methods}{
 
 \describe{
@@ -74,7 +75,7 @@ screening field}
 
 \item{\code{run(...)}}{Compute tree with rpart parameters}
 }}
+
 \seealso{
 \code{\link{VT.tree.reg}}, \code{\link{VT.tree.class}}
 }
-
diff --git a/man/aVirtualTwins.Rd b/man/aVirtualTwins.Rd
index da56540..8f91663 100644
--- a/man/aVirtualTwins.Rd
+++ b/man/aVirtualTwins.Rd
@@ -4,6 +4,7 @@
 \name{aVirtualTwins}
 \alias{aVirtualTwins}
 \alias{aVirtualTwins-package}
+\alias{aVirtualTwins-package}
 \title{aVirtualTwins : An adapation of VirtualTwins method created by Jared Foster.}
 \description{
 aVirtualTwins is written mainly with reference classes. Briefly, there is three kinds of class :
diff --git a/man/formatRCTDataset.Rd b/man/formatRCTDataset.Rd
index 6501c09..0844031 100644
--- a/man/formatRCTDataset.Rd
+++ b/man/formatRCTDataset.Rd
@@ -43,4 +43,3 @@ data.format <- formatRCTDataset(data, "outcome", "treatment", TRUE)
  
   
 }
-
diff --git a/man/sepsis.Rd b/man/sepsis.Rd
index e902206..7579398 100644
--- a/man/sepsis.Rd
+++ b/man/sepsis.Rd
@@ -43,4 +43,3 @@ True subgroup is \emph{PRAPACHE <= 26 & AGE <= 49.80}. \emph{NOTE:} This
 subgroup is defined with the \emph{lower} event rate (survival = 1) in
 treatement arm.
 }
-
diff --git a/man/vt.data.Rd b/man/vt.data.Rd
index 2f5d78d..1b4ddb2 100644
--- a/man/vt.data.Rd
+++ b/man/vt.data.Rd
@@ -33,4 +33,3 @@ a VT.object object.
 }
   
 }
-
diff --git a/man/vt.forest.Rd b/man/vt.forest.Rd
index e47bbc8..ffbf0e1 100644
--- a/man/vt.forest.Rd
+++ b/man/vt.forest.Rd
@@ -69,4 +69,3 @@ parameter forest.type, any of these class can be used with its own parameter.
 }   
 
 }
-
diff --git a/man/vt.subgroups.Rd b/man/vt.subgroups.Rd
index c4a072d..5eb2f65 100644
--- a/man/vt.subgroups.Rd
+++ b/man/vt.subgroups.Rd
@@ -46,4 +46,3 @@ rpart.plot must be loaded. See \code{\link{VT.tree}} for details.
 }
 
 }
-
diff --git a/man/vt.tree.Rd b/man/vt.tree.Rd
index a5c252d..f2e6241 100644
--- a/man/vt.tree.Rd
+++ b/man/vt.tree.Rd
@@ -56,4 +56,3 @@ See \code{\link{VT.tree}}, \code{\link{VT.tree.class}} and
 }
   
 }
-
diff --git a/revdep/check.R b/revdep/check.R
new file mode 100644
index 0000000..e262948
--- /dev/null
+++ b/revdep/check.R
@@ -0,0 +1,5 @@
+library("devtools")
+
+revdep_check()
+revdep_check_save_summary()
+revdep_check_print_problems()
diff --git a/revdep/checks.rds b/revdep/checks.rds
new file mode 100644
index 0000000..82941ab
Binary files /dev/null and b/revdep/checks.rds differ