diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
index 28932b6b0f..cc903e0591 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
@@ -221,7 +221,9 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
 
         public List<SceneObjectPart> GetLinkParts(int linkType)
         {
-            List<SceneObjectPart> ret = new List<SceneObjectPart>();
+            List<SceneObjectPart> ret = new List<SceneObjectPart>();
+            if (m_host == null || m_host.ParentGroup == null || m_host.ParentGroup.IsDeleted)
+                return ret;
             ret.Add(m_host);
 
             switch (linkType)
@@ -1136,7 +1138,9 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
         }
 
         public void llSetStatus(int status, int value)
-        {
+        {
+            if (m_host == null || m_host.ParentGroup == null || m_host.ParentGroup.IsDeleted)
+                return;
             m_host.AddScriptLPS(1);
 
             int statusrotationaxis = 0;
@@ -1290,7 +1294,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
         }
 
         protected void SetScale(SceneObjectPart part, LSL_Vector scale)
-        {
+        {
             // TODO: this needs to trigger a persistance save as well
             if (part == null || part.ParentGroup == null || part.ParentGroup.IsDeleted)
                 return;
@@ -1349,7 +1353,10 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
         }
 
         protected void SetColor(SceneObjectPart part, LSL_Vector color, int face)
-        {
+        {
+            if (part == null || part.ParentGroup == null || part.ParentGroup.IsDeleted)
+                return;
+
             Primitive.TextureEntry tex = part.Shape.Textures;
             Color4 texcolor;
             if (face >= 0 && face < GetNumberOfSides(part))
@@ -1386,7 +1393,10 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
         }
 
         public void SetTexGen(SceneObjectPart part, int face,int style)
-        {
+        {
+            if (part == null || part.ParentGroup == null || part.ParentGroup.IsDeleted)
+                return;
+
             Primitive.TextureEntry tex = part.Shape.Textures;
             MappingType textype;
             textype = MappingType.Default;
@@ -1416,7 +1426,10 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
         }
 
         public void SetGlow(SceneObjectPart part, int face, float glow)
-        {
+        {
+            if (part == null || part.ParentGroup == null || part.ParentGroup.IsDeleted)
+                return;
+
             Primitive.TextureEntry tex = part.Shape.Textures;
             if (face >= 0 && face < GetNumberOfSides(part))
             {
@@ -1441,7 +1454,9 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
         }
 
         public void SetShiny(SceneObjectPart part, int face, int shiny, Bumpiness bump)
-        {
+        {
+            if (part == null || part.ParentGroup == null || part.ParentGroup.IsDeleted)
+                return;
 
             Shininess sval = new Shininess();
 
@@ -1491,7 +1506,10 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
         }
 
         public void SetFullBright(SceneObjectPart part, int face, bool bright)
-        {
+        {
+            if (part == null || part.ParentGroup == null || part.ParentGroup.IsDeleted)
+                return;
+
              Primitive.TextureEntry tex = part.Shape.Textures;
              if (face >= 0 && face < GetNumberOfSides(part))
              {
@@ -1558,7 +1576,10 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
         }
 
         protected void SetAlpha(SceneObjectPart part, double alpha, int face)
-        {
+        {
+            if (part == null || part.ParentGroup == null || part.ParentGroup.IsDeleted)
+                return;
+
             Primitive.TextureEntry tex = part.Shape.Textures;
             Color4 texcolor;
             if (face >= 0 && face < GetNumberOfSides(part))
@@ -1603,8 +1624,8 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
         /// <param name="Force"></param>
         protected void SetFlexi(SceneObjectPart part, bool flexi, int softness, float gravity, float friction,
             float wind, float tension, LSL_Vector Force)
-        {
-            if (part == null)
+        {
+            if (part == null || part.ParentGroup == null || part.ParentGroup.IsDeleted)
                 return;
 
             if (flexi)
@@ -1638,8 +1659,8 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
         /// <param name="radius"></param>
         /// <param name="falloff"></param>
         protected void SetPointLight(SceneObjectPart part, bool light, LSL_Vector color, float intensity, float radius, float falloff)
-        {
-            if (part == null)
+        {
+            if (part == null || part.ParentGroup == null || part.ParentGroup.IsDeleted)
                 return;
 
             if (light)
@@ -1724,7 +1745,10 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
         }
 
         protected void SetTexture(SceneObjectPart part, string texture, int face)
-        {
+        {
+            if (part == null || part.ParentGroup == null || part.ParentGroup.IsDeleted)
+                return;
+
             UUID textureID=new UUID();
 
             if (!UUID.TryParse(texture, out textureID))
@@ -1769,7 +1793,10 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
         }
 
         protected void ScaleTexture(SceneObjectPart part, double u, double v, int face)
-        {
+        {
+            if (part == null || part.ParentGroup == null || part.ParentGroup.IsDeleted)
+                return;
+
             Primitive.TextureEntry tex = part.Shape.Textures;
             if (face >= 0 && face < GetNumberOfSides(part))
             {
@@ -1805,7 +1832,10 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
         }
 
         protected void OffsetTexture(SceneObjectPart part, double u, double v, int face)
-        {
+        {
+            if (part == null || part.ParentGroup == null || part.ParentGroup.IsDeleted)
+                return;
+
             Primitive.TextureEntry tex = part.Shape.Textures;
             if (face >= 0 && face < GetNumberOfSides(part))
             {
@@ -1841,7 +1871,10 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
         }
 
         protected void RotateTexture(SceneObjectPart part, double rotation, int face)
-        {
+        {
+            if (part == null || part.ParentGroup == null || part.ParentGroup.IsDeleted)
+                return;
+
             Primitive.TextureEntry tex = part.Shape.Textures;
             if (face >= 0 && face < GetNumberOfSides(part))
             {
@@ -1911,7 +1944,10 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
         }
 
         protected void SetPos(SceneObjectPart part, LSL_Vector targetPos)
-        {
+        {
+            if (part == null || part.ParentGroup == null || part.ParentGroup.IsDeleted)
+                return;
+
             // Capped movemment if distance > 10m (http://wiki.secondlife.com/wiki/LlSetPos)
             LSL_Vector currentPos = llGetLocalPos();
 
@@ -2005,7 +2041,10 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
         }
 
         protected void SetRot(SceneObjectPart part, Quaternion rot)
-        {
+        {
+            if (part == null || part.ParentGroup == null || part.ParentGroup.IsDeleted)
+                return;
+
             part.UpdateRotation(rot);
             // Update rotation does not move the object in the physics scene if it's a linkset.
 
@@ -6499,8 +6538,10 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
         }
 
         protected ObjectShapePacket.ObjectDataBlock SetPrimitiveBlockShapeParams(SceneObjectPart part, int holeshape, LSL_Vector cut, float hollow, LSL_Vector twist)
-        {
-            ObjectShapePacket.ObjectDataBlock shapeBlock = new ObjectShapePacket.ObjectDataBlock();
+        {
+            ObjectShapePacket.ObjectDataBlock shapeBlock = new ObjectShapePacket.ObjectDataBlock();
+            if (part == null || part.ParentGroup == null || part.ParentGroup.IsDeleted)
+                return shapeBlock;
 
             if (holeshape != (int)ScriptBaseClass.PRIM_HOLE_DEFAULT &&
                 holeshape != (int)ScriptBaseClass.PRIM_HOLE_CIRCLE &&
@@ -6569,7 +6610,10 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
         }
 
         protected void SetPrimitiveShapeParams(SceneObjectPart part, int holeshape, LSL_Vector cut, float hollow, LSL_Vector twist, LSL_Vector taper_b, LSL_Vector topshear, byte fudge)
-        {
+        {
+            if (part == null || part.ParentGroup == null || part.ParentGroup.IsDeleted)
+                return;
+
             ObjectShapePacket.ObjectDataBlock shapeBlock;
 
             shapeBlock = SetPrimitiveBlockShapeParams(part, holeshape, cut, hollow, twist);
@@ -6617,7 +6661,10 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
         }
 
         protected void SetPrimitiveShapeParams(SceneObjectPart part, int holeshape, LSL_Vector cut, float hollow, LSL_Vector twist, LSL_Vector dimple, byte fudge)
-        {
+        {
+            if (part == null || part.ParentGroup == null || part.ParentGroup.IsDeleted)
+                return;
+
             ObjectShapePacket.ObjectDataBlock shapeBlock;
 
             shapeBlock = SetPrimitiveBlockShapeParams(part, holeshape, cut, hollow, twist);
@@ -6658,7 +6705,10 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
         }
 
         protected void SetPrimitiveShapeParams(SceneObjectPart part, int holeshape, LSL_Vector cut, float hollow, LSL_Vector twist, LSL_Vector holesize, LSL_Vector topshear, LSL_Vector profilecut, LSL_Vector taper_a, float revolutions, float radiusoffset, float skew, byte fudge)
-        {
+        {
+            if (part == null || part.ParentGroup == null || part.ParentGroup.IsDeleted)
+                return;
+
             ObjectShapePacket.ObjectDataBlock shapeBlock;
 
             shapeBlock = SetPrimitiveBlockShapeParams(part, holeshape, cut, hollow, twist);
@@ -6778,7 +6828,10 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
         }
 
         protected void SetPrimitiveShapeParams(SceneObjectPart part, string map, int type)
-        {
+        {
+            if (part == null || part.ParentGroup == null || part.ParentGroup.IsDeleted)
+                return;
+
             ObjectShapePacket.ObjectDataBlock shapeBlock = new ObjectShapePacket.ObjectDataBlock();
             UUID sculptId;
 
@@ -6812,14 +6865,14 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
         }
 
         public void llSetPrimitiveParams(LSL_List rules)
-        {
+        {
             m_host.AddScriptLPS(1);
             SetPrimParams(m_host, rules);
         }
 
         public void llSetLinkPrimitiveParams(int linknumber, LSL_List rules)
-        {
-            m_host.AddScriptLPS(1);
+        {
+             m_host.AddScriptLPS(1);
 
             List<SceneObjectPart> parts = GetLinkParts(linknumber);
 
@@ -6828,7 +6881,10 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
         }
 
         protected void SetPrimParams(SceneObjectPart part, LSL_List rules)
-        {
+        {
+            if (part == null || part.ParentGroup == null || part.ParentGroup.IsDeleted)
+                return;
+
             int idx = 0;
 
             while (idx < rules.Length)