ADS (AURIX Development Studio) is downloaded to the TC264 board, the program can be compiled successfully, but the download fails.
1. After testing that the DAS driver is normal, the following figure shows the steps of DAS testing the microcontroller 
:
1. Open DAS Scanner, click Star DAS Server
2. Pop up DAS Server Control Panel, click Installed Servers
3. Pop up Installed DAS Servers, click Star behind UDAS, and observe whether TriCore-Family appears in the DAS Scanner box. If it does, there is no problem.
2. Use memtool to download the generated hex file:
1. Click Target->change
2. Select the MCU model in Default, here is the TC264 type MCU.
Click OK 
3. Click Connect, the Ready for Memtool Command is displayed, indicating that the connection is successful, Open File->Select All->Add Select ->Program, the download is complete, power on again, and observe the microcontroller.
If it succeeds, it means that there is no problem with the single-chip computer and the downloader. It is probably determined that the problem is with the ADS software. Longqiu provides the 1.2 version of the ADS. There are many problems. You can go to the official website to download the latest ADS version. Version 1.3, there is no problem with it, 
indicating that Infineon has solved this problem.