diff --git a/Assets/Scripts/OpenTS2/Content/DBPF/SimsObjectAsset.cs b/Assets/Scripts/OpenTS2/Content/DBPF/SimsObjectAsset.cs
index cc52cf5..7fd3853 100644
--- a/Assets/Scripts/OpenTS2/Content/DBPF/SimsObjectAsset.cs
+++ b/Assets/Scripts/OpenTS2/Content/DBPF/SimsObjectAsset.cs
@@ -35,6 +35,7 @@ public struct SimsObjectStackFrame
     {
         public ushort ObjectId;
         public ushort TreeId;
+        public ushort BhavSaveType;
 
         public short[] Params;
         public short[] Locals;
diff --git a/Assets/Scripts/OpenTS2/Engine/Tests/LotObjectSimulationTest.cs b/Assets/Scripts/OpenTS2/Engine/Tests/LotObjectSimulationTest.cs
index dc1adf1..4acb1d0 100644
--- a/Assets/Scripts/OpenTS2/Engine/Tests/LotObjectSimulationTest.cs
+++ b/Assets/Scripts/OpenTS2/Engine/Tests/LotObjectSimulationTest.cs
@@ -1,6 +1,7 @@
 using System.Collections;
 using System.Collections.Generic;
 using System.IO;
+using System.Linq;
 using OpenTS2.Common;
 using OpenTS2.Content;
 using OpenTS2.Content.DBPF;
@@ -58,6 +59,21 @@ private void LoadLot(string neighborhoodPrefix, int id)
                 lotPackage.GetAssetByTGI<ObjectSaveTypeTableAsset>(new ResourceKey(instanceID: 0, GroupIDs.Local,
                     TypeIDs.OBJ_SAVE_TYPE_TABLE));
 
+            var saveTypeToGuid = new Dictionary<int, uint>();
+            for (var index = 0; index < saveTable.Selectors.Count; index++)
+            {
+                var selector = saveTable.Selectors[index];
+                var def = ObjectManager.Instance.GetObjectByGUID(selector.objectGuid);
+                if (def == null)
+                {
+                    continue;
+                }
+
+                saveTypeToGuid[selector.saveType] = selector.objectGuid;
+
+                Debug.Log($"{index}: saveType: {selector.saveType} resource name: {selector.catalogResourceName}, Obj name: {def.FileName}");
+            }
+
             var objectToLoad = saveTable.Selectors[ItemIndex];
             Debug.Log($"Loading object {objectToLoad.catalogResourceName} with guid {objectToLoad.objectGuid:X}");
 
@@ -80,10 +96,23 @@ private void LoadLot(string neighborhoodPrefix, int id)
 
             foreach (var frame in objectState.StackFrames)
             {
-                var vmFrame = new VMStackFrame(entity.GetBHAV(frame.TreeId), entity.MainThread);
-                vmFrame.Arguments = frame.Params;
-                vmFrame.Locals = frame.Locals;
+                Debug.Log("Frame -----");
+                Debug.Log($"  TreeId: 0x{frame.TreeId:X}, bhavSaveType: {frame.BhavSaveType}");
+
+                var bhavObjDef = ObjectManager.Instance.GetObjectByGUID(saveTypeToGuid[frame.BhavSaveType]);
+                // TODO: add a static method to do this or something. We don't want to make a VMEntity instance just
+                // to get the BHAV.
+                var bhav = new VMEntity(bhavObjDef).GetBHAV(frame.TreeId);
+
+                var vmFrame = new VMStackFrame(bhav, entity.MainThread)
+                {
+                    Arguments = frame.Params,
+                    Locals = frame.Locals
+                };
                 entity.MainThread.Frames.Push(vmFrame);
+
+                Debug.Log($"  BHAV TGI: {entity.MainThread.Frames.Peek().BHAV.GlobalTGI}");
+                Debug.Log($"  params: ({string.Join(", ", vmFrame.Arguments)})");
             }
 
             vm.Tick();
diff --git a/Assets/Scripts/OpenTS2/Files/Formats/DBPF/SimsObjectCodec.cs b/Assets/Scripts/OpenTS2/Files/Formats/DBPF/SimsObjectCodec.cs
index 24eec5e..79e108b 100644
--- a/Assets/Scripts/OpenTS2/Files/Formats/DBPF/SimsObjectCodec.cs
+++ b/Assets/Scripts/OpenTS2/Files/Formats/DBPF/SimsObjectCodec.cs
@@ -60,15 +60,12 @@ private static SimsObjectAsset DeserializeWithVersion(IoBuffer reader, int versi
                 semiAttrs[i] = reader.ReadInt16();
             }
 
-            Debug.Log($"  Data array offset: {reader.Position:X}");
-
             // 8 unknown shorts called "data".
             var dataArray = new short[8];
             for (var i = 0; i < dataArray.Length; i++)
             {
                 dataArray[i] = reader.ReadInt16();
             }
-            Debug.Log($"dataArray: [{string.Join(", ", dataArray)}]");
 
             // Next is a number of shorts that depends on the exact version of the file.
             uint numShorts = version switch
@@ -104,7 +101,6 @@ private static SimsObjectAsset DeserializeWithVersion(IoBuffer reader, int versi
             }
             Debug.Log($"InventoryToken(tokenGUID={tokenGUID}, tokenFlags={tokenFlags}, numTokenProps={numTokenProperties})");
 
-
             // Next is the number of object arrays. Each being a short array itself.
             var numObjectArrays = reader.ReadInt16();
             var shortArrays = new List<short[]>(numObjectArrays);
@@ -184,6 +180,7 @@ private static SimsObjectAsset DeserializeWithVersion(IoBuffer reader, int versi
                 {
                     ObjectId = objectID,
                     TreeId = treeID,
+                    BhavSaveType = behavSaveType,
                     Locals = locals,
                     Params = frameParams
                 };
diff --git a/Assets/Scripts/OpenTS2/SimAntics/VMEntity.cs b/Assets/Scripts/OpenTS2/SimAntics/VMEntity.cs
index 390c286..53c102c 100644
--- a/Assets/Scripts/OpenTS2/SimAntics/VMEntity.cs
+++ b/Assets/Scripts/OpenTS2/SimAntics/VMEntity.cs
@@ -5,6 +5,7 @@
 using OpenTS2.Lua.Disassembly.OpCodes;
 using System;
 using System.Collections.Generic;
+using System.IO;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
@@ -33,7 +34,7 @@ public uint SemiGlobalGroupID
             {
                 var semiGlobal = ObjectDefinition.SemiGlobal;
                 if (semiGlobal == null)
-                    return 0;
+                    throw new FileNotFoundException($"Object {ObjectDefinition.FileName} ({ObjectDefinition.GlobalTGI}) has no semi-global file");
                 return semiGlobal.SemiGlobalGroupID;
             }
         }