Compiling error : Unknown file extension ' '

I am compiling a file that contains a caller block, and that c caller block is calling c file that have many header files included. But while compiling its giving error Unknown "file extension ' ' ". Can anyone tell me how to solve this one?

[Fangjun Jiang]

That message indicates the file extension is a whitespace. Check if there is any file name that might be accidently inserted a whitespace in its extension.

[AKHILA]

Checked that one, but no file is having whitespace in its extension.

[Aravind]

Hi,

Can you share your files or maybe some reproduction steps for this error?

[AKHILA]

HI, I can't share file, but this are the files for blinking an led using stm board.

Answer 1

[Prasanna]

Hi AKHILA,

The error message "Unknown file extension ' '" typically occurs when a C/C++ compiler encounters a file with an unrecognized or missing extension. To solve the issue, you can perform the following debugging steps to pinpoint the error:

• Check file extensions for whitespace issues and hidden characters
• Verify the file paths and double check the paths to the source and header files in the project build configuration
• Check the include directives in your C files
• Verify your compiler settings to check if it is configured to compile the file types you are using

For more information regarding the following issue, you can refer the following references as well:

• Unknown file extension mex: https://www.mathworks.com/matlabcentral/answers/623573-error-using-mex-unknown-file-extension-matlab-ubuntu
• File extension not recognized error: https://www.mathworks.com/matlabcentral/answers/601561-file-extension-not-recognized

Hope this helps!