Directly I used your command in the command prompt, the error attached in the image above.Later I realized that I have to provide the path for build_wrapper_output_directory(referred some path) and my_clean_build_command (i have CLI command as .bat file, so provided that path)
I am doing this from desktop( all keil projects and sonar-scanner in desktop) , Sonar-scanner.properties is available in the following path c:\test;\sonar-scanner-4.4.0.2170-windows\conf\ and edited my properties file as below.