1 files changed, 26 insertions, 22 deletions

diff --git a/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs b/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs
index 0277ed8..13d1d4e 100644
--- a/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs
+++ b/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs
@@ -106,9 +106,9 @@ namespace OpenSim.Region.Framework.Scenes
         private bool m_hasGroupChanged = false;
         private long timeFirstChanged = 0;
         private long timeLastChanged = 0;
-        long m_maxPersistTime = 0;
-        long m_minPersistTime = 0;
-        Random m_rand;
+        private long m_maxPersistTime = 0;
+        private long m_minPersistTime = 0;
+        private Random m_rand;
 
         private System.Threading.ReaderWriterLockSlim m_partsLock = new System.Threading.ReaderWriterLockSlim();
 
@@ -186,27 +186,31 @@ namespace OpenSim.Region.Framework.Scenes
                     timeLastChanged = DateTime.Now.Ticks;
                     if (!m_hasGroupChanged)
                         timeFirstChanged = DateTime.Now.Ticks;
-                    if (m_rand == null)
+                    if (m_rootPart != null && m_rootPart.UUID != null && m_scene != null)
                     {
-                        byte[] val = new byte[16];
-                        m_rootPart.UUID.ToBytes(val, 0);
-                        m_rand = new Random(BitConverter.ToInt32(val, 0));
-                    }
-                    if (Scene.GetRootAgentCount() == 0)
-                    {
-                        //If the region is empty, this change has been made by an automated process
-                        //and thus we delay the persist time by a random amount between 1.5 and 2.5.
+                        if (m_rand == null)
+                        {
+                            byte[] val = new byte[16];
+                            m_rootPart.UUID.ToBytes(val, 0);
+                            m_rand = new Random(BitConverter.ToInt32(val, 0));
+                        }
+                       
+                        if (m_scene.GetRootAgentCount() == 0)
+                        {
+                            //If the region is empty, this change has been made by an automated process
+                            //and thus we delay the persist time by a random amount between 1.5 and 2.5.
 
-                        float factor = 1.5f + (float)(m_rand.NextDouble());
-                        m_maxPersistTime = (long)((float)Scene.m_persistAfter * factor);
-                        m_minPersistTime = (long)((float)Scene.m_dontPersistBefore * factor);
-                    }
-                    else
-                    {
-                        //If the region is not empty, we want to obey the minimum and maximum persist times
-                        //but add a random factor so we stagger the object persistance a little
-                        m_maxPersistTime = (long)((float)Scene.m_persistAfter * (1.0d - (m_rand.NextDouble() / 5.0d))); //Multiply by 1.0-1.5
-                        m_minPersistTime = (long)((float)Scene.m_dontPersistBefore * (1.0d + (m_rand.NextDouble() / 2.0d))); //Multiply by 0.8-1.0
+                            float factor = 1.5f + (float)(m_rand.NextDouble());
+                            m_maxPersistTime = (long)((float)m_scene.m_persistAfter * factor);
+                            m_minPersistTime = (long)((float)m_scene.m_dontPersistBefore * factor);
+                        }
+                        else
+                        {
+                            //If the region is not empty, we want to obey the minimum and maximum persist times
+                            //but add a random factor so we stagger the object persistance a little
+                            m_maxPersistTime = (long)((float)m_scene.m_persistAfter * (1.0d - (m_rand.NextDouble() / 5.0d))); //Multiply by 1.0-1.5
+                            m_minPersistTime = (long)((float)m_scene.m_dontPersistBefore * (1.0d + (m_rand.NextDouble() / 2.0d))); //Multiply by 0.8-1.0
+                        }
                     }
                 }
                 m_hasGroupChanged = value;