diff --git a/OpenSim/Region/ScriptEngine/DotNetEngine/Compiler/YieldProlog/IndexedAnswers.cs b/OpenSim/Region/ScriptEngine/DotNetEngine/Compiler/YieldProlog/IndexedAnswers.cs
index bba7d03caa..5810c0b615 100644
--- a/OpenSim/Region/ScriptEngine/DotNetEngine/Compiler/YieldProlog/IndexedAnswers.cs
+++ b/OpenSim/Region/ScriptEngine/DotNetEngine/Compiler/YieldProlog/IndexedAnswers.cs
@@ -249,6 +249,7 @@ namespace OpenSim.Region.ScriptEngine.DotNetEngine.Compiler.YieldProlog
             object[] arguments = YP.getFunctorArgs(Head);
 
             // We always match Head from _allAnswers, and the Body is Atom.a("true").
+            #pragma warning disable 0168
             foreach (bool l1 in YP.unify(Body, Atom.a("true")))
             {
                 // The caller can assert another answer into this same predicate during yield, so we have to
@@ -259,6 +260,7 @@ namespace OpenSim.Region.ScriptEngine.DotNetEngine.Compiler.YieldProlog
                         yield return false;
                 }
             }
+            #pragma warning restore 0168
         }
 
         public IEnumerable<bool> retract(object Head, object Body)
@@ -268,7 +270,9 @@ namespace OpenSim.Region.ScriptEngine.DotNetEngine.Compiler.YieldProlog
                 throw new PrologException("instantiation_error", "Head is an unbound variable");
             object[] arguments = YP.getFunctorArgs(Head);
 
-            // We always match Head from _allAnswers, and the Body is Atom.a("true").
+            // We always match Head from _allAnswers, and the Body is
+            // Atom.a("true").
+            #pragma warning disable 0168
             foreach (bool l1 in YP.unify(Body, Atom.a("true")))
             {
                 // The caller can assert another answer into this same predicate during yield, so we have to
@@ -283,6 +287,7 @@ namespace OpenSim.Region.ScriptEngine.DotNetEngine.Compiler.YieldProlog
                     }
                 }
             }
+            #pragma warning restore 0168
         }
 
         /// <summary>
diff --git a/OpenSim/Region/ScriptEngine/DotNetEngine/Compiler/YieldProlog/YP.cs b/OpenSim/Region/ScriptEngine/DotNetEngine/Compiler/YieldProlog/YP.cs
index 6c981bb843..537c114492 100644
--- a/OpenSim/Region/ScriptEngine/DotNetEngine/Compiler/YieldProlog/YP.cs
+++ b/OpenSim/Region/ScriptEngine/DotNetEngine/Compiler/YieldProlog/YP.cs
@@ -673,8 +673,10 @@ namespace OpenSim.Region.ScriptEngine.DotNetEngine.Compiler.YieldProlog
                     object[] args = new object[(int)Arity];
                     for (int i = 0; i < args.Length; ++i)
                         args[i] = new Variable();
+                    #pragma warning disable 0219
                     foreach (bool l1 in YP.unify(Term, Functor.make((Atom)FunctorName, args)))
                         yield return false;
+                    #pragma warning restore 0219
                 }
             }
             else
@@ -2399,11 +2401,13 @@ namespace OpenSim.Region.ScriptEngine.DotNetEngine.Compiler.YieldProlog
                 if (_Head == null || _Body == null)
                     yield break;
 
+                #pragma warning disable 0168
                 foreach (bool l1 in YP.unify(Head, _Head))
                 {
                     foreach (bool l2 in YP.unify(Body, _Body))
                         yield return false;
                 }
+                #pragma warning restore 0168
             }
         }
     }
diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Runtime/YieldProlog/IndexedAnswers.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Runtime/YieldProlog/IndexedAnswers.cs
index 2bf9db766c..7d41945935 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Runtime/YieldProlog/IndexedAnswers.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Runtime/YieldProlog/IndexedAnswers.cs
@@ -249,6 +249,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.YieldProlog
             object[] arguments = YP.getFunctorArgs(Head);
 
             // We always match Head from _allAnswers, and the Body is Atom.a("true").
+            #pragma warning disable 0168
             foreach (bool l1 in YP.unify(Body, Atom.a("true")))
             {
                 // The caller can assert another answer into this same predicate during yield, so we have to
@@ -259,6 +260,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.YieldProlog
                         yield return false;
                 }
             }
+            #pragma warning restore 0168
         }
 
         public IEnumerable<bool> retract(object Head, object Body)
@@ -268,7 +270,9 @@ namespace OpenSim.Region.ScriptEngine.Shared.YieldProlog
                 throw new PrologException("instantiation_error", "Head is an unbound variable");
             object[] arguments = YP.getFunctorArgs(Head);
 
-            // We always match Head from _allAnswers, and the Body is Atom.a("true").
+            // We always match Head from _allAnswers, and the Body is
+            // Atom.a("true").
+            #pragma warning disable 0168
             foreach (bool l1 in YP.unify(Body, Atom.a("true")))
             {
                 // The caller can assert another answer into this same predicate during yield, so we have to
@@ -283,6 +287,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.YieldProlog
                     }
                 }
             }
+            #pragma warning restore 0168
         }
 
         /// <summary>
diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Runtime/YieldProlog/YP.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Runtime/YieldProlog/YP.cs
index 3d19d3e49a..17f2f1cb25 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Runtime/YieldProlog/YP.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Runtime/YieldProlog/YP.cs
@@ -673,8 +673,10 @@ namespace OpenSim.Region.ScriptEngine.Shared.YieldProlog
                     object[] args = new object[(int)Arity];
                     for (int i = 0; i < args.Length; ++i)
                         args[i] = new Variable();
+                    #pragma warning disable 0219
                     foreach (bool l1 in YP.unify(Term, Functor.make((Atom)FunctorName, args)))
                         yield return false;
+                    #pragma warning restore 0219
                 }
             }
             else
@@ -2399,11 +2401,13 @@ namespace OpenSim.Region.ScriptEngine.Shared.YieldProlog
                 if (_Head == null || _Body == null)
                     yield break;
 
+                #pragma warning disable 0168
                 foreach (bool l1 in YP.unify(Head, _Head))
                 {
                     foreach (bool l2 in YP.unify(Body, _Body))
                         yield return false;
                 }
+                #pragma warning disable 0168
             }
         }
     }