I assume you want to start a macro from the command line? => You find some explanations here:
xample: A Windows batch file to run a Selenium IDE/Kantu macro from the command line on looks like this:
"C:\Program Files (x86)\Google\Chrome\Application\chrome.exe" "file:///D:/mytestcases/DemoAutofill1.html?direct=1&close=1&savelog=log1.txt"
Windows is used as an example here, the command line feature also works on Mac and Linux as well. “demoautofill.html” is the exported Kantu macro. Note that you must use file:/// for the file path.
I assume this is your issue because if you just start with “C:…” you will get a “file not found” error for the HTML file due to the appended “?direct=1&close=1&savelog=log1.txt” GET parameters.