forestall bug reports about the Command error: System.EntryPointNotFoundException: CreateZStream save/load oar/iar issue by telling the user what the likely problem is

2 files changed, 26 insertions, 2 deletions

diff --git a/OpenSim/Region/CoreModules/World/Archiver/ArchiveReadRequest.cs b/OpenSim/Region/CoreModules/World/Archiver/ArchiveReadRequest.cs
index 8ed1913..ad58f40 100644
--- a/OpenSim/Region/CoreModules/World/Archiver/ArchiveReadRequest.cs
+++ b/OpenSim/Region/CoreModules/World/Archiver/ArchiveReadRequest.cs
@@ -73,7 +73,19 @@ namespace OpenSim.Region.CoreModules.World.Archiver
         public ArchiveReadRequest(Scene scene, string loadPath, bool merge, Guid requestId)
         {
             m_scene = scene;
-            m_loadStream = new GZipStream(GetStream(loadPath), CompressionMode.Decompress);
+
+            try
+            {
+                m_loadStream = new GZipStream(GetStream(loadPath), CompressionMode.Decompress);
+            }
+            catch (EntryPointNotFoundException e)
+            {
+                m_log.ErrorFormat(
+                    "[ARCHIVER]: Mismatch between Mono and zlib1g library version when trying to create compression stream."
+                        + "If you've manually installed Mono, have you appropriately updated zlib1g as well?");
+                m_log.Error(e);
+            }
+        
             m_errorMessage = String.Empty;
             m_merge = merge;
             m_requestId = requestId;
diff --git a/OpenSim/Region/CoreModules/World/Archiver/ArchiveWriteRequestPreparation.cs b/OpenSim/Region/CoreModules/World/Archiver/ArchiveWriteRequestPreparation.cs
index 71bfe57..b61b341 100644
--- a/OpenSim/Region/CoreModules/World/Archiver/ArchiveWriteRequestPreparation.cs
+++ b/OpenSim/Region/CoreModules/World/Archiver/ArchiveWriteRequestPreparation.cs
@@ -65,7 +65,19 @@ namespace OpenSim.Region.CoreModules.World.Archiver
         public ArchiveWriteRequestPreparation(Scene scene, string savePath, Guid requestId)
         {
             m_scene = scene;
-            m_saveStream = new GZipStream(new FileStream(savePath, FileMode.Create), CompressionMode.Compress);
+
+            try
+            {
+                m_saveStream = new GZipStream(new FileStream(savePath, FileMode.Create), CompressionMode.Compress);
+            }
+            catch (EntryPointNotFoundException e)
+            {
+                m_log.ErrorFormat(
+                    "[ARCHIVER]: Mismatch between Mono and zlib1g library version when trying to create compression stream."
+                        + "If you've manually installed Mono, have you appropriately updated zlib1g as well?");
+                m_log.Error(e);
+            }
+            
             m_requestId = requestId;
         }