diff --git a/src/FDM/JSBSim/FGFDMExec.cpp b/src/FDM/JSBSim/FGFDMExec.cpp
index ab0bf8a9a..25c5bdd17 100644
--- a/src/FDM/JSBSim/FGFDMExec.cpp
+++ b/src/FDM/JSBSim/FGFDMExec.cpp
@@ -78,22 +78,6 @@ static const char *IdHdr = ID_FDMEXEC;
 CLASS IMPLEMENTATION
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
 
-void checkTied ( FGPropertyManager *node )
-{
-  int N = node->nChildren();
-  string name;
-
-  for (int i=0; i<N; i++) {
-    if (node->getChild(i)->nChildren() ) {
-      checkTied( (FGPropertyManager*)node->getChild(i) );
-    }
-    if ( node->getChild(i)->isTied() ) {
-      name = ((FGPropertyManager*)node->getChild(i))->GetFullyQualifiedName();
-      node->Untie(name);
-    }
-  }
-}
-
 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 // Constructor
 
@@ -185,7 +169,7 @@ FGFDMExec::FGFDMExec(FGPropertyManager* root, unsigned int* fdmctr) : Root(root)
 FGFDMExec::~FGFDMExec()
 {
   try {
-    checkTied( instance );
+    Unbind();
     DeAllocate();
     
     if (IdFDM == 0) { // Meaning this is no child FDM
diff --git a/src/FDM/JSBSim/FGFDMExec.h b/src/FDM/JSBSim/FGFDMExec.h
index c1038c471..b982654e7 100644
--- a/src/FDM/JSBSim/FGFDMExec.h
+++ b/src/FDM/JSBSim/FGFDMExec.h
@@ -227,7 +227,7 @@ public:
   ~FGFDMExec();
 
   /** Unbind all tied JSBSim properties. */
-  void unbind(void) {instance->unbind();}
+  void Unbind(void) {instance->Unbind();}
 
   /** This routine places a model into the runlist at the specified rate. The
       "rate" is not really a clock rate. It represents how many calls to the
diff --git a/src/FDM/JSBSim/JSBSim.cxx b/src/FDM/JSBSim/JSBSim.cxx
index ba35d6900..0f8d5130a 100644
--- a/src/FDM/JSBSim/JSBSim.cxx
+++ b/src/FDM/JSBSim/JSBSim.cxx
@@ -426,7 +426,7 @@ void FGJSBsim::init()
 
 void FGJSBsim::unbind()
 {
-  fdmex->unbind();
+  fdmex->Unbind();
   FGInterface::unbind();
 }
 
diff --git a/src/FDM/JSBSim/input_output/FGPropertyManager.cpp b/src/FDM/JSBSim/input_output/FGPropertyManager.cpp
index 899565ed2..c0218ec20 100755
--- a/src/FDM/JSBSim/input_output/FGPropertyManager.cpp
+++ b/src/FDM/JSBSim/input_output/FGPropertyManager.cpp
@@ -53,7 +53,7 @@ std::vector<std::string> FGPropertyManager::tied_properties;
 
 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
-void FGPropertyManager::unbind(void)
+void FGPropertyManager::Unbind(void)
 {
     vector<string>::iterator it;
     for (it = tied_properties.begin();it < tied_properties.end();it++)
@@ -314,11 +314,12 @@ void FGPropertyManager::Untie (const string &name)
 
 void FGPropertyManager::Tie (const string &name, bool *pointer, bool useDefault)
 {
-  tied_properties.push_back(name);
   if (!tie(name.c_str(), SGRawValuePointer<bool>(pointer), useDefault))
     cerr << "Failed to tie property " << name << " to a pointer" << endl;
-  else if (debug_lvl & 0x20)
-    cout << name << endl;
+  else {
+    tied_properties.push_back(name);
+    if (debug_lvl & 0x20) std::cout << name << std::endl;
+  }
 }
 
 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@@ -326,11 +327,12 @@ void FGPropertyManager::Tie (const string &name, bool *pointer, bool useDefault)
 void FGPropertyManager::Tie (const string &name, int *pointer,
                                           bool useDefault )
 {
-  tied_properties.push_back(name);
   if (!tie(name.c_str(), SGRawValuePointer<int>(pointer), useDefault))
     cerr << "Failed to tie property " << name << " to a pointer" << endl;
-  else if (debug_lvl & 0x20)
-    cout << name << endl;
+  else {
+    tied_properties.push_back(name);
+    if (debug_lvl & 0x20) std::cout << name << std::endl;
+  }
 }
 
 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@@ -338,11 +340,12 @@ void FGPropertyManager::Tie (const string &name, int *pointer,
 void FGPropertyManager::Tie (const string &name, long *pointer,
                                           bool useDefault )
 {
-  tied_properties.push_back(name);
   if (!tie(name.c_str(), SGRawValuePointer<long>(pointer), useDefault))
     cerr << "Failed to tie property " << name << " to a pointer" << endl;
-  else if (debug_lvl & 0x20)
-    cout << name << endl;
+  else {
+    tied_properties.push_back(name);
+    if (debug_lvl & 0x20) std::cout << name << std::endl;
+  }
 }
 
 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@@ -350,22 +353,24 @@ void FGPropertyManager::Tie (const string &name, long *pointer,
 void FGPropertyManager::Tie (const string &name, float *pointer,
                                           bool useDefault )
 {
-  tied_properties.push_back(name);
   if (!tie(name.c_str(), SGRawValuePointer<float>(pointer), useDefault))
     cerr << "Failed to tie property " << name << " to a pointer" << endl;
-  else if (debug_lvl & 0x20)
-    cout << name << endl;
+  else {
+    tied_properties.push_back(name);
+    if (debug_lvl & 0x20) std::cout << name << std::endl;
+  }
 }
 
 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 void FGPropertyManager::Tie (const string &name, double *pointer, bool useDefault)
 {
-  tied_properties.push_back(name);
   if (!tie(name.c_str(), SGRawValuePointer<double>(pointer), useDefault))
     cerr << "Failed to tie property " << name << " to a pointer" << endl;
-  else if (debug_lvl & 0x20)
-    cout << name << endl;
+  else {
+    tied_properties.push_back(name);
+    if (debug_lvl & 0x20) std::cout << name << std::endl;
+  }
 }
 
 } // namespace JSBSim
diff --git a/src/FDM/JSBSim/input_output/FGPropertyManager.h b/src/FDM/JSBSim/input_output/FGPropertyManager.h
index 54ea91874..a08f89681 100644
--- a/src/FDM/JSBSim/input_output/FGPropertyManager.h
+++ b/src/FDM/JSBSim/input_output/FGPropertyManager.h
@@ -406,7 +406,7 @@ class FGPropertyManager : public SGPropertyNode, public FGJSBBase
      * Classes should use this function to release control of any
      * properties they have bound using this property manager.
      */
-    void unbind (void);
+    void Unbind (void);
 
         // Templates cause ambiguity here
 
@@ -534,8 +534,10 @@ class FGPropertyManager : public SGPropertyNode, public FGJSBBase
     {
       if (!tie(name.c_str(), SGRawValueFunctions<V>(getter, setter), useDefault))
         std::cout << "Failed to tie property " << name << " to functions" << std::endl;
-      else if (debug_lvl & 0x20)
-        std::cout << name << std::endl;
+      else {
+        tied_properties.push_back(name);
+        if (debug_lvl & 0x20) std::cout << name << std::endl;
+      }
     }
 
 
@@ -562,8 +564,10 @@ class FGPropertyManager : public SGPropertyNode, public FGJSBBase
     {
       if (!tie(name.c_str(), SGRawValueFunctionsIndexed<V>(index, getter, setter), useDefault))
         std::cout << "Failed to tie property " << name << " to indexed functions" << std::endl;
-      else if (debug_lvl & 0x20)
-        std::cout << name << std::endl;
+      else {
+        tied_properties.push_back(name);
+        if (debug_lvl & 0x20) std::cout << name << std::endl;
+      }
     }
 
 
@@ -592,8 +596,10 @@ class FGPropertyManager : public SGPropertyNode, public FGJSBBase
     {
       if (!tie(name.c_str(), SGRawValueMethods<T,V>(*obj, getter, setter), useDefault))
         std::cout << "Failed to tie property " << name << " to object methods" << std::endl;
-      else if (debug_lvl & 0x20)
-        std::cout << name << std::endl;
+      else {
+        tied_properties.push_back(name);
+        if (debug_lvl & 0x20) std::cout << name << std::endl;
+      }
     }
 
     /**
@@ -621,8 +627,10 @@ class FGPropertyManager : public SGPropertyNode, public FGJSBBase
     {
       if (!tie(name.c_str(), SGRawValueMethodsIndexed<T,V>(*obj, index, getter, setter), useDefault))
         std::cout << "Failed to tie property " << name << " to indexed object methods" << std::endl;
-      else if (debug_lvl & 0x20)
-        std::cout << name << std::endl;
+      else {
+        tied_properties.push_back(name);
+        if (debug_lvl & 0x20) std::cout << name << std::endl;
+      }
    }
 };
 }