kindlegen.executable Ant parameter
Specifies the name, and if necessary, full path of the kindlegen command-line executable
The absolute path to the "kindlegen" executable (available from Amazon).
If the kindlegen executable is in your PATH environment variable and it is named "kindlegen" then you should not need to specify this parameter.
If the kindlegen executable is in your path but is named something other than "kindlegen" then you can specify just the name of the executable, not the entire path.