The tnsnames.ora file is at path 
C:\Oracle\product\11.1.0\client_1\Network\Admin 
SQL developer tool and our .Net application works fine with the tnsnames.  The stack trace is 
Application does not support just-in-time (JIT) 
debugging. See the end of this message for details.  
************** Exception Text ************** 
System.ArgumentException: An item with the same key has already been added. 
at System.ThrowHelper.ThrowArgumentException(ExceptionResource resource) 
at System.Collections.Generic.Dictionary`2.Insert(TKey key, TValue value, Boolean add) 
at RedGate.Oracle.Utils.TNSNames.GetTNSEntriesFromFile(String tnsNamesPath) 
at RedGate.Oracle.Utils.TNSNames.GetTNSEntries(String oracleHome) 
at RedGate.Oracle.Comparison.UI.Controls.DataSourceControls.TnsConnection.a(Object , EventArgs ) 
at System.Windows.Forms.Control.OnTextChanged(EventArgs e) 
at System.Windows.Forms.ComboBox.OnTextChanged(EventArgs e) 
at System.Windows.Forms.ComboBox.set_SelectedIndex(Int32 value) 
at RedGate.Oracle.Comparison.UI.Controls.DataSourceControls.TnsConnection.LoadDefaults() 
at RedGate.Oracle.Comparison.UI.Controls.DataSourceControls.LiveDataSourceControl.LoadDefaults() 
at RedGate.Oracle.Comparison.UI.Controls.DataSourceControls.DataSourcePicker.LoadDefaults() 
at ai..ctor(Project project, aj pct, Boolean newProject, Boolean forceRecompare) 
at bi.a(aj , Project , Boolean , Boolean , Boolean , Predicate`1 ) 
at bi.New() 
at bE.i(Object , EventArgs ) 
at System.Windows.Forms.Form.OnShown(EventArgs e) 
at System.Windows.Forms.Form.CallShownEvent() 
at System.Windows.Forms.Control.InvokeMarshaledCallbackDo(ThreadMethodEntry tme) 
at System.Windows.Forms.Control.InvokeMarshaledCallbackHelper(Object obj) 
at System.Threading.ExecutionContext.runTryCode(Object userData) 
at System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode code, CleanupCode backoutCode, Object userData) 
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state) 
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state) 
at System.Windows.Forms.Control.InvokeMarshaledCallback(ThreadMethodEntry tme) 
at System.Windows.Forms.Control.InvokeMarshaledCallbacks()   
************** Loaded Assemblies ************** 
mscorlib 
Assembly Version: 2.0.0.0 
Win32 Version: 2.0.50727.1433 (REDBITS.050727-1400) 
CodeBase: file:///C:/WINDOWS/Microsoft.NET/Framework/v2.0.50727/mscorlib.dll
RedGate.Oracle.Compare.UI 
Assembly Version: 1.0.0.397 
Win32 Version: 1.0.0.397 
CodeBase: file:///C:/Program%20Files/Red%20Gate/Schema%20Compare%20for%20Oracle%201/RedGate.Oracle.Compare.UI.exe
System.Windows.Forms 
Assembly Version: 2.0.0.0 
Win32 Version: 2.0.50727.1433 (REDBITS.050727-1400) 
CodeBase: file:///C:/WINDOWS/assembly/GAC_MSIL/System.Windows.Forms/2.0.0.0__b77a5c561934e089/System.Windows.Forms.dll
System 
Assembly Version: 2.0.0.0 
Win32 Version: 2.0.50727.1433 (REDBITS.050727-1400) 
CodeBase: file:///C:/WINDOWS/assembly/GAC_MSIL/System/2.0.0.0__b77a5c561934e089/System.dll
System.Drawing 
Assembly Version: 2.0.0.0 
Win32 Version: 2.0.50727.1433 (REDBITS.050727-1400) 
CodeBase: file:///C:/WINDOWS/assembly/GAC_MSIL/System.Drawing/2.0.0.0__b03f5f7f11d50a3a/System.Drawing.dll
Ninject.Core 
Assembly Version: 1.0.0.82 
Win32 Version: 1.0.0.82 
CodeBase: file:///C:/Program%20Files/Red%20Gate/Schema%20Compare%20for%20Oracle%201/Ninject.Core.DLL
RedGate.Shared.Controls 
Assembly Version: 8.0.0.24 
Win32 Version: 8.0.0.24 
CodeBase: file:///C:/Program%20Files/Red%20Gate/Schema%20Compare%20for%20Oracle%201/RedGate.Shared.Controls.DLL
DevExpress.Utils.v7.2 
Assembly Version: 7.2.4.0 
Win32 Version: 7.2.4.0 
CodeBase: file:///C:/Program%20Files/Red%20Gate/Schema%20Compare%20for%20Oracle%201/DevExpress.Utils.v7.2.DLL
RedGate.Oracle.ObjectModel 
Assembly Version: 1.0.0.397 
Win32 Version: 1.0.0.397 
CodeBase: file:///C:/Program%20Files/Red%20Gate/Schema%20Compare%20for%20Oracle%201/RedGate.Oracle.ObjectModel.DLL
RedGate.Shared.Utils 
Assembly Version: 8.0.0.21 
Win32 Version: 8.0.0.21 
CodeBase: file:///C:/Program%20Files/Red%20Gate/Schema%20Compare%20for%20Oracle%201/RedGate.Shared.Utils.DLL
RedGate.Oracle.Compare.EngineController 
Assembly Version: 1.0.0.397 
Win32 Version: 1.0.0.397 
CodeBase: file:///C:/Program%20Files/Red%20Gate/Schema%20Compare%20for%20Oracle%201/RedGate.Oracle.Compare.EngineController.DLL
DevExpress.XtraBars.v7.2 
Assembly Version: 7.2.4.0 
Win32 Version: 7.2.4.0 
CodeBase: file:///C:/Program%20Files/Red%20Gate/Schema%20Compare%20for%20Oracle%201/DevExpress.XtraBars.v7.2.DLL
DevExpress.XtraEditors.v7.2 
Assembly Version: 7.2.4.0 
Win32 Version: 7.2.4.0 
CodeBase: file:///C:/Program%20Files/Red%20Gate/Schema%20Compare%20for%20Oracle%201/DevExpress.XtraEditors.v7.2.DLL
DevExpress.Data.v7.2 
Assembly Version: 7.2.4.0 
Win32 Version: 7.2.4.0 
CodeBase: file:///C:/Program%20Files/Red%20Gate/Schema%20Compare%20for%20Oracle%201/DevExpress.Data.v7.2.DLL
ActiproSoftware.UIStudio.Dock.Net20 
Assembly Version: 2.0.77.0 
Win32 Version: 2.0.77.0 
CodeBase: file:///C:/Program%20Files/Red%20Gate/Schema%20Compare%20for%20Oracle%201/ActiproSoftware.UIStudio.Dock.Net20.DLL
ActiproSoftware.Shared.Net20 
Assembly Version: 1.0.85.0 
Win32 Version: 1.0.85.0 
CodeBase: file:///C:/Program%20Files/Red%20Gate/Schema%20Compare%20for%20Oracle%201/ActiproSoftware.Shared.Net20.DLL
ActiproSoftware.WinUICore.Net20 
Assembly Version: 1.0.85.0 
Win32 Version: 1.0.85.0 
CodeBase: file:///C:/Program%20Files/Red%20Gate/Schema%20Compare%20for%20Oracle%201/ActiproSoftware.WinUICore.Net20.DLL
System.Xml 
Assembly Version: 2.0.0.0 
Win32 Version: 2.0.50727.1433 (REDBITS.050727-1400) 
CodeBase: file:///C:/WINDOWS/assembly/GAC_MSIL/System.Xml/2.0.0.0__b77a5c561934e089/System.Xml.dll
System.Design 
Assembly Version: 2.0.0.0 
Win32 Version: 2.0.50727.1433 (REDBITS.050727-1400) 
CodeBase: file:///C:/WINDOWS/assembly/GAC_MSIL/System.Design/2.0.0.0__b03f5f7f11d50a3a/System.Design.dll
DevExpress.XtraGrid.v7.2 
Assembly Version: 7.2.4.0 
Win32 Version: 7.2.4.0 
CodeBase: file:///C:/Program%20Files/Red%20Gate/Schema%20Compare%20for%20Oracle%201/DevExpress.XtraGrid.v7.2.DLL
System.Data 
Assembly Version: 2.0.0.0 
Win32 Version: 2.0.50727.1433 (REDBITS.050727-1400) 
CodeBase: file:///C:/WINDOWS/assembly/GAC_32/System.Data/2.0.0.0__b77a5c561934e089/System.Data.dll
RedGate.Oracle.Utils 
Assembly Version: 1.0.0.397 
Win32 Version: 1.0.0.397 
CodeBase: file:///C:/Program%20Files/Red%20Gate/Schema%20Compare%20for%20Oracle%201/RedGate.Oracle.Utils.DLL
RedGate.Update.Client 
Assembly Version: 2.2.0.3 
Win32 Version: 2.2.0.3 
CodeBase: file:///C:/Program%20Files/Red%20Gate/Schema%20Compare%20for%20Oracle%201/RedGate.Update.Client.DLL
System.Web.Services 
Assembly Version: 2.0.0.0 
Win32 Version: 2.0.50727.1433 (REDBITS.050727-1400) 
CodeBase: file:///C:/WINDOWS/assembly/GAC_MSIL/System.Web.Services/2.0.0.0__b03f5f7f11d50a3a/System.Web.Services.dll
 
************** JIT Debugging ************** 
Application does not support Windows Forms just-in-time (JIT) 
debugging. Contact the application author for more 
information. / comments
                        
                        
                        
                      
                      
                        
                          - Community
- Schema Compare for Oracle Beta
- Error at Startup
The tnsnames.ora file is at path
C:\Oracle\product\11.1.0\client_1\Network\Admin
SQL developer tool and our .Net application works fine with the tnsnames.The stack trace is
Application does not sup...
                      
                        
                        
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