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Hello, I'm using Embarcadero C++Builder 11 Community Edition to write a simple program that connects to a selected Bluetooth LE device. After discovering desired services, I try to read the characteristics, but the program hangs when reading the service->Characteristics property. Here is my code snippet: TGUID VSP_GUID = StringToGUID("{569a1101-b87f-490c-92cb-11ba5ea5167c}"); void __fastcall TForm1::BluetoothLEServicesDiscovered(TObject * const Sender, TBluetoothGattServiceList * const AServiceList) { for(int i=0;i<AServiceList->Count;i++) { if(AServiceList->Items[i]->UUID == VSP_GUID) { TBluetoothGattService * service = AServiceList->Items[i]; if(service->Characteristics != NULL) //freezes here { } } } } The problem appears on Windows 11. On Windows 10, everything worked fine. I have tried this code on C++ Builder 12 Trial Version, but problem still exists. What should I do and where is the problem?