diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2f4705da4..ddcef2ba0 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -38,7 +38,7 @@ ENDIF()
 
 # Versioning
 # ===========
-SALOME_SETUP_VERSION(9.7.0 DEVELOPMENT)
+SALOME_SETUP_VERSION(9.8.0 DEVELOPMENT)
 MESSAGE(STATUS "Building ${PROJECT_NAME_UC} ${${PROJECT_NAME_UC}_VERSION} from \"${${PROJECT_NAME_UC}_GIT_SHA1}\"")
 
 # Find KERNEL
diff --git a/doc/salome/examples/test_smeshplugins.py b/doc/salome/examples/test_smeshplugins.py
index 48f12085c..a6efe765c 100644
--- a/doc/salome/examples/test_smeshplugins.py
+++ b/doc/salome/examples/test_smeshplugins.py
@@ -17,6 +17,7 @@ __revision__ = "V1.0"
 ComputeMeshes = True
 
 import salome
+import platform
 
 salome.salome_init_without_session()
 theStudy = salome.myStudy
@@ -74,23 +75,27 @@ while not ERROR :
         print(TEXTE+": OK")
 
 # B.2. Gmsh
-  TEXTE = "Gmsh"
-  MESH_2 = smesh.Mesh(BOX)
-  smesh.SetName(MESH_2.GetMesh(), "M_"+TEXTE)
-  try :
-    GMSH = MESH_2.Tetrahedron(algo=smeshBuilder.GMSH)
-  except :
-    MESSAGE += "\nImpossible d'utiliser "+TEXTE
-    ERROR += 1
+  # GMSH for windows not yet implemented BOS #18709
+  if platform.system() != "Windows" :
+    TEXTE = "Gmsh"
+    MESH_2 = smesh.Mesh(BOX)
+    smesh.SetName(MESH_2.GetMesh(), "M_"+TEXTE)
+    try :
+      GMSH = MESH_2.Tetrahedron(algo=smeshBuilder.GMSH)
+    except :
+      MESSAGE += "\nImpossible d'utiliser "+TEXTE
+      ERROR += 1
+    else :
+      if ComputeMeshes :
+        smesh.SetName(GMSH.GetAlgorithm(), TEXTE)
+        OK_COMPUTE = MESH_2.Compute()
+        if not OK_COMPUTE :
+          MESSAGE += "\nErreur avec "+TEXTE
+          ERROR += 1
+        else :
+          print(TEXTE+": OK")
   else :
-    if ComputeMeshes :
-      smesh.SetName(GMSH.GetAlgorithm(), TEXTE)
-      OK_COMPUTE = MESH_2.Compute()
-      if not OK_COMPUTE :
-        MESSAGE += "\nErreur avec "+TEXTE
-        ERROR += 1
-      else :
-        print(TEXTE+": OK")
+    print("Skipping B.2 on windows")
 
 # B.3. MG_CADSurf
   TEXTE = "MG_CADSurf"
diff --git a/doc/salome/examples/tests.set b/doc/salome/examples/tests.set
index 4e392b19d..5382b5e9f 100644
--- a/doc/salome/examples/tests.set
+++ b/doc/salome/examples/tests.set
@@ -43,9 +43,7 @@ SET(BAD_TESTS
   quality_controls_ex22.py
   viewing_meshes_ex01.py
   radial_prism_3d_algo.py
-  test_smeshplugin_mg_tetra_parallele.py
   test_smeshplugins.py
-  MGAdaptTests_without_session.py
   blocFissure_01_without_session.py
   blocFissure_02_without_session.py
   blocFissure_03_without_session.py
@@ -55,6 +53,13 @@ SET(BAD_TESTS
   blocFissure_07_without_session.py
   )
 
+IF(NOT WIN32)
+  LIST(APPEND BAD_TESTS
+    MGAdaptTests_without_session.py
+    test_smeshplugin_mg_tetra_parallele.py
+  )
+ENDIF(NOT WIN32)
+
 SET(GOOD_TESTS
   cartesian_algo.py
   create_penta_biquad.py
diff --git a/src/SMESHGUI/SMESHGUI.cxx b/src/SMESHGUI/SMESHGUI.cxx
index 531901fd1..d7b4ed744 100644
--- a/src/SMESHGUI/SMESHGUI.cxx
+++ b/src/SMESHGUI/SMESHGUI.cxx
@@ -2082,7 +2082,20 @@ void SMESHGUI::OnEditDelete()
         SMESH::RemoveHypothesisOrAlgorithmOnMesh(IObject);
         aStudyBuilder->RemoveObjectWithChildren( SO );
       }
-      else {// default action: remove SObject from the study
+      else {// default action: remove SObject from the study		
+		// Find Sub-Meshes and Group and delete corresopning visual objects and actors
+		_PTR(ChildIterator) it1 = aStudy->NewChildIterator(SO);
+		for (it1->InitEx(false); it1->More(); it1->Next()) {
+		  _PTR(SObject) SObj = it1->Value();
+		  if (!SObj) continue;
+		  if (SObj->FindAttribute(anAttr, "AttributeIOR")) {
+			SMESH::SMESH_GroupBase_var aGroup = SMESH::SMESH_GroupBase::_narrow(SMESH::SObjectToObject(SObj));
+			SMESH::SMESH_subMesh_var   aSubMesh = SMESH::SMESH_subMesh::_narrow(SMESH::SObjectToObject(SObj));
+			if (!aGroup->_is_nil() || !aSubMesh->_is_nil()) {
+			  SMESH::RemoveVisualObjectWithActors(SObj->GetID().c_str(), true);
+			}
+		  }
+		}
         // san - it's no use opening a transaction here until UNDO/REDO is provided in SMESH
         //SUIT_Operation *op = new SALOMEGUI_ImportOperation(myActiveStudy);
         //op->start();
diff --git a/src/StdMeshers/StdMeshers_Cartesian_3D.cxx b/src/StdMeshers/StdMeshers_Cartesian_3D.cxx
index c847d9efb..346372a6f 100644
--- a/src/StdMeshers/StdMeshers_Cartesian_3D.cxx
+++ b/src/StdMeshers/StdMeshers_Cartesian_3D.cxx
@@ -4458,7 +4458,7 @@ namespace
 
     // connect pn2 (probably new, at _eIntNodes) with a split
 
-    int i, iConn;
+    int i, iConn = 0;
     size_t nbCommon;
     TGeomID commonFaces[20];
     _Node* nPrev = nullptr;
diff --git a/src/StdMeshers/StdMeshers_MEFISTO_2D.cxx b/src/StdMeshers/StdMeshers_MEFISTO_2D.cxx
index 48b07193e..0222fa7e2 100644
--- a/src/StdMeshers/StdMeshers_MEFISTO_2D.cxx
+++ b/src/StdMeshers/StdMeshers_MEFISTO_2D.cxx
@@ -637,7 +637,11 @@ bool StdMeshers_MEFISTO_2D::LoadPoints(TWireVector &                 wires,
       m++;
     }
 
-    int mFirst = mOnVertex.front(), mLast = m - 1;
+    int mFirst = 0, mLast = 0;
+    if (!mOnVertex.empty()) {
+      mFirst = mOnVertex.front();
+      mLast = m - 1;
+    }
     list< int >::iterator mIt = mOnVertex.begin();
     for ( ; mIt != mOnVertex.end(); ++mIt)
     {