diff --git a/development/gambas3/README b/development/gambas3/README
index e9c3407ec1..fb39105149 100644
--- a/development/gambas3/README
+++ b/development/gambas3/README
@@ -7,6 +7,8 @@ make 3D OpenGL applications, make CGI web applications, and so on.
 
 alure, gtkglext, imlib2, unixODBC, sqlite2, postgresql, sdl2_image,
 sdl2_ttf, sdl2_mixer and qt5-webkit are optional dependencies.
+You should uninstall any present version of gambas before creating
+this package.
 
 It can create slackware packages of your programs, but only the
 noarch version contains the program.
diff --git a/development/gambas3/gambas3.SlackBuild b/development/gambas3/gambas3.SlackBuild
index 7c09b315e7..325bf9a964 100644
--- a/development/gambas3/gambas3.SlackBuild
+++ b/development/gambas3/gambas3.SlackBuild
@@ -22,11 +22,11 @@
 # OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 # ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-# updates since version 3.11.2 Copyright 2018 Tim Dickson dickson.tim@googlemail.com
+# updates since version 3.11.2 Copyright 2018/9 Tim Dickson dickson.tim@googlemail.com
 
 PRGNAM=gambas3
 SRCNAM=gambas
-VERSION=${VERSION:-3.11.4}
+VERSION=${VERSION:-3.12.1}
 BUILD=${BUILD:-1}
 TAG=${TAG:-_SBo}
 
@@ -58,7 +58,12 @@ else
 fi
 
 set -e
-
+if [ "x`ls /var/log/packages|grep ^$PRGNAM|wc -l`" = "x1" ]; then
+  #and current installs of gambas should be uninstalled before
+  #attempting to create this gambas3 package
+  echo "you must uninstall $PRGNAM before creating package $PRGNAM ver $VERSION"
+  exit 2
+fi
 rm -rf $PKG
 mkdir -p $TMP $PKG $OUTPUT
 cd $TMP
diff --git a/development/gambas3/gambas3.info b/development/gambas3/gambas3.info
index af8880ae1e..53e26daca4 100644
--- a/development/gambas3/gambas3.info
+++ b/development/gambas3/gambas3.info
@@ -1,8 +1,8 @@
 PRGNAM="gambas3"
-VERSION="3.11.4"
+VERSION="3.12.1"
 HOMEPAGE="http://gambas.sourceforge.net"
-DOWNLOAD="https://gitlab.com/gambas/gambas/-/archive/3.11.4/gambas-3.11.4.tar.bz2"
-MD5SUM="6fe631f5fc0208b871e7c9a6cda42b01"
+DOWNLOAD="https://gitlab.com/gambas/gambas/-/archive/3.12.1/gambas-3.12.1.tar.bz2"
+MD5SUM="53f3f6629270dbcd5deb4ac6aae5e54a"
 DOWNLOAD_x86_64=""
 MD5SUM_x86_64=""
 REQUIRES=""