3 files changed, 22 insertions, 9 deletions

diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/AsyncCommandManager.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/AsyncCommandManager.cs
index 9d97cb2..ee32755 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/AsyncCommandManager.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/AsyncCommandManager.cs
@@ -236,7 +236,8 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
             iHttpReq.StopHttpRequest(localID, itemID);
 
             IWorldComm comms = engine.World.RequestModuleInterface<IWorldComm>();
-            comms.DeleteListener(itemID);
+            if (comms != null)
+                comms.DeleteListener(itemID);
 
             IXMLRPC xmlrpc = engine.World.RequestModuleInterface<IXMLRPC>();
             xmlrpc.DeleteChannels(itemID);
diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
index b387728..ec771e3 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
@@ -749,7 +749,8 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
                           ChatTypeEnum.Whisper, channelID, m_host.ParentGroup.RootPart.AbsolutePosition, m_host.Name, m_host.UUID, false);
 
             IWorldComm wComm = m_ScriptEngine.World.RequestModuleInterface<IWorldComm>();
-            wComm.DeliverMessage(ChatTypeEnum.Whisper, channelID, m_host.Name, m_host.UUID, text);
+            if (wComm != null)
+                wComm.DeliverMessage(ChatTypeEnum.Whisper, channelID, m_host.Name, m_host.UUID, text);
         }
 
         public void llSay(int channelID, string text)
@@ -769,7 +770,8 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
                               ChatTypeEnum.Say, channelID, m_host.ParentGroup.RootPart.AbsolutePosition, m_host.Name, m_host.UUID, false);
 
                 IWorldComm wComm = m_ScriptEngine.World.RequestModuleInterface<IWorldComm>();
-                wComm.DeliverMessage(ChatTypeEnum.Say, channelID, m_host.Name, m_host.UUID, text);
+                if (wComm != null)
+                    wComm.DeliverMessage(ChatTypeEnum.Say, channelID, m_host.Name, m_host.UUID, text);
             }
         }
 
@@ -784,7 +786,8 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
                           ChatTypeEnum.Shout, channelID, m_host.ParentGroup.RootPart.AbsolutePosition, m_host.Name, m_host.UUID, true);
 
             IWorldComm wComm = m_ScriptEngine.World.RequestModuleInterface<IWorldComm>();
-            wComm.DeliverMessage(ChatTypeEnum.Shout, channelID, m_host.Name, m_host.UUID, text);
+            if (wComm != null)
+                wComm.DeliverMessage(ChatTypeEnum.Shout, channelID, m_host.Name, m_host.UUID, text);
         }
 
         public void llRegionSay(int channelID, string text)
@@ -801,7 +804,8 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
             m_host.AddScriptLPS(1);
 
             IWorldComm wComm = m_ScriptEngine.World.RequestModuleInterface<IWorldComm>();
-            wComm.DeliverMessage(ChatTypeEnum.Region, channelID, m_host.Name, m_host.UUID, text);
+            if (wComm != null)
+                wComm.DeliverMessage(ChatTypeEnum.Region, channelID, m_host.Name, m_host.UUID, text);
         }
 
         public LSL_Integer llListen(int channelID, string name, string ID, string msg)
@@ -810,21 +814,26 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
             UUID keyID;
             UUID.TryParse(ID, out keyID);
             IWorldComm wComm = m_ScriptEngine.World.RequestModuleInterface<IWorldComm>();
-            return wComm.Listen(m_localID, m_itemID, m_host.UUID, channelID, name, keyID, msg);
+            if (wComm != null)
+                return wComm.Listen(m_localID, m_itemID, m_host.UUID, channelID, name, keyID, msg);
+            else
+                return -1;
         }
 
         public void llListenControl(int number, int active)
         {
             m_host.AddScriptLPS(1);
             IWorldComm wComm = m_ScriptEngine.World.RequestModuleInterface<IWorldComm>();
-            wComm.ListenControl(m_itemID, number, active);
+            if (wComm != null)
+                wComm.ListenControl(m_itemID, number, active);
         }
 
         public void llListenRemove(int number)
         {
             m_host.AddScriptLPS(1);
             IWorldComm wComm = m_ScriptEngine.World.RequestModuleInterface<IWorldComm>();
-            wComm.ListenRemove(m_itemID, number);
+            if (wComm != null)
+                wComm.ListenRemove(m_itemID, number);
         }
 
         public void llSensor(string name, string id, int type, double range, double arc)
diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/Plugins/Timer.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/Plugins/Timer.cs
index 0716d45..eeb59d9 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/Plugins/Timer.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/Plugins/Timer.cs
@@ -166,7 +166,10 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api.Plugins
                 ts.next = DateTime.Now.Ticks + (long)data[idx+1];
                 idx += 2;
 
-                Timers.Add(MakeTimerKey(localID,itemID), ts);
+                lock (TimerListLock)
+                {
+                    Timers.Add(MakeTimerKey(localID, itemID), ts);
+                }
             }
         }
     }