diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9daf4ea55..fa0b7207b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,6 +1,6 @@
 # SPDX-License-Identifier: EPL-2.0 OR GPL-2.0-or-later
 # SPDX-FileCopyrightText: Bradley M. Bell <bradbell@seanet.com>
-# SPDX-FileContributor: 2003-23 Bradley M. Bell
+# SPDX-FileContributor: 2003-24 Bradley M. Bell
 # ----------------------------------------------------------------------------
 # =============================================================================
 # Some constants
@@ -16,7 +16,7 @@ IF( POLICY CMP0054 )
 ENDIF( POLICY CMP0054 )
 #
 # cppad_version is used by version.sh to get the version number.
-SET(cppad_version "20240223")
+SET(cppad_version "20240224")
 SET(cppad_url          "https://coin-or.github.io/CppAD" )
 SET(cppad_description  "Differentiation of C++ Algorithms" )
 IF( NOT DEFINED CMAKE_BUILD_TYPE)
diff --git a/bin/check_copy.sh b/bin/check_copy.sh
index 5b3c959eb..2a5f28bf2 100755
--- a/bin/check_copy.sh
+++ b/bin/check_copy.sh
@@ -57,7 +57,8 @@ do
    if [ -e $file_name ]
    then
       sed \
-      -e 's|\(SPDX-FileContributor\): \([0-9]\{4\}\)[-0-9]* |\1: \2-24 |' \
+      -e 's|\(SPDX-FileContributor\): *\([0-9]\{4\}\)[-0-9]* |\1: \2-24 |' \
+      -e 's|\(SPDX-FileContributor\): 2024-24 |\1: 2024 |' \
       $file_name > temp.$$
       if diff $file_name temp.$$ > /dev/null
       then
diff --git a/bin/check_version.sh b/bin/check_version.sh
index 7c87a8a2d..92bd10457 100755
--- a/bin/check_version.sh
+++ b/bin/check_version.sh
@@ -2,7 +2,7 @@
 set -e -u
 # SPDX-License-Identifier: EPL-2.0 OR GPL-2.0-or-later
 # SPDX-FileCopyrightText: Bradley M. Bell <bradbell@seanet.com>
-# SPDX-FileContributor: 2003-22 Bradley M. Bell
+# SPDX-FileContributor: 2003-24 Bradley M. Bell
 # ----------------------------------------------------------------------------
 if [ $# != 0 ]
 then
@@ -46,31 +46,21 @@ version=$(
       sed -e 's|.*"\([^"]*\)".*|\1|'
 )
 #
-# version, release
-release='yes'
-if echo $version | grep '[0-9]\{4\}0000[.]' > /dev/null
+# branch
+branch=$(git branch | sed -n -e '/^[*]/p' | sed -e 's|^[*] *||')
+#
+# version
+if [ "$branch" == 'master' ]
+then
+   version=$( date +%Y%m%d )
+fi
+if echo $branch | grep '^stable/' > /dev/null
 then
-   res=''
-   while [ "$res" != 'ok' ] && [ "$res" != 'date' ] && [ "$res" != 'abort' ]
-   do
-      echo "In CMakeLists.txt version = $version"
-      echo 'ok:    use this version.'
-      echo 'date:  repalce this by the current date.'
-      echo 'abort: if you whish to change the version in CMakeLists.txt.'
-      read -p '[ok/date/abort] ?' res
-   done
-   if [ "$res" == 'abort' ]
+   if ! echo $version | grep '^[0-9]\{4\}0000[.]' > /dev/null
    then
+      echo 'check_version.sh: Stable version does not begin with yyyy0000.'
       exit 1
    fi
-   if [ "$res" == 'date' ]
-   then
-      release='no'
-      version=$( date +%Y%m%d )
-   fi
-else
-   release='no'
-   version=$( date +%Y%m%d )
 fi
 #
 # version_ok
@@ -83,7 +73,7 @@ version_files='
 '
 #
 # temp.sed
-if [ "$release" == 'yes' ]
+if echo $branch | grep '^stable/' > /dev/null
 then
    stable=$( echo $version | sed -e 's|[.][0-9]*$||' )
 cat << EOF > temp.sed
diff --git a/user_guide.xrst b/user_guide.xrst
index 635e7e81c..129731881 100644
--- a/user_guide.xrst
+++ b/user_guide.xrst
@@ -1,6 +1,6 @@
 # SPDX-License-Identifier: EPL-2.0 OR GPL-2.0-or-later
 # SPDX-FileCopyrightText: Bradley M. Bell <bradbell@seanet.com>
-# SPDX-FileContributor: 2003-23 Bradley M. Bell
+# SPDX-FileContributor: 2003-24 Bradley M. Bell
 # ----------------------------------------------------------------------------
 {xrst_begin user_guide}
 {xrst_spell
@@ -13,7 +13,7 @@
 
 {xrst_comment BEGIN: Before changing see new_release.sh and check_version.sh}
 
-cppad-20240223: CppAD User's Manual
+cppad-20240224: CppAD User's Manual
 ###################################
 
 .. image:: {xrst_dir coin.png}