"External Mode Open Protocol CheckData command failed" Error

I am trying to implement a PI controller with an STM32F401RE Nucleo board. I am tryping to run the model in external mode but I get this error:

External Mode Open Protocol CheckData command failed

Caused by:

• Multiple errors detected.
• XCP internal error: timeout expired, in response to XCP SYNCH command
• Error detected while trying to disconnect Simulink from target application.
• XCP error: XCP internal error: No server connected

The model compiles without any error, builds and connects with the board. This error comes up only when it is tryping to run on the target. The time stamp reads 0.00 for a few seconds and then this error pops up.

[Masoud Vaezi]

Hi

I wonder if you could solve this problem. I am getting the same error.

[Ege Gediksiz]

Same problem with Nucleo- STM32G431KB. I can deploy the model on the board, but for "Monitor & Tune" I get the same XCP error. It is weird cause I don't think these boards use XCP protocol.

I have enabled all the necessary DMA and USART settings for external mode but this happens. Hope the staff answers this problem soon.

[ROBbb]

I have the same problem... please help us!!

[Luuk Paul]

try going to hardware settings/target hardware resources/external mode and switch the communication interface to tcp/ip. worked for me

Answer 1

[Narvik]

Hi Samuel Osei Fobi,

I understand that you are facing an issue while trying to run your PI controller model in external mode. The error “External Mode Open Protocol CheckData command failed” might occur when the connection to STM32F401RE Nucleo board is blocked.

It is possible that certain firewall settings on your system are blocking the connection, causing the external mode to stop or crash immediately upon starting. To resolve this issue, please review your firewall settings and ensure that they allow the necessary connections for the external mode to operate properly.

Hope this helps!

[Hassan]

can you explain it more?