Hello, I'm studying simulation. I have a question about the error code.

I am studying simulation, but I am asking you this question because I cannot guess the following error occurred.

We have created Proposed Building and Baseline Building for LEED.

Exception occurred during export. Exporter: SystemProjectControllerSystem.Exception: Export exception ---> System.Exception: An error occurred during the System idf data preparation.
Sequence contains no elements
--- End of inner exception stack trace ---
at Common.Model.BaseExportSettings.SetExceptionIfNotAlreadySetAndThrow(Exception ex)
at SystemProjectModule.Export.SystemExportToIDF.ExportToIDF(IList`1 availableSystems, ExportSettings exportSettings)
at SystemProjectModule.SystemProjectController.<>c__DisplayClass65_0.<OnExportToIdf>b__0()
at System.Windows.Threading.DispatcherOperation.InvokeDelegateCore()
at System.Windows.Threading.DispatcherOperation.InvokeImpl()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Windows.Threading.DispatcherOperation.Wait(TimeSpan timeout)
at System.Windows.Threading.Dispatcher.InvokeImpl(DispatcherOperation operation, CancellationToken cancellationToken, TimeSpan timeout)
at System.Windows.Threading.Dispatcher.Invoke(Action callback, DispatcherPriority priority, CancellationToken cancellationToken, TimeSpan timeout)
at System.Windows.Threading.Dispatcher.Invoke(Action callback)
at Common.Utilities.DispatcherUtils.InvokeDispatcher(Action act)
at SystemProjectModule.SystemProjectController.<OnExportToIdf>d__65.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)
at ImportExportModule.ImportExportController.<ExportIdf>d__55.MoveNext()

Thanks