Example
Datastage Message Handlers command line options
Usage: isx [options] [command] [command options]
Commands:
help Usage: help [options]
message-handlers Usage: message-handlers [options]
Options:
* -isx
ISX directory
* -msh
Message handlers directory
eg:
$> mettleci isx message-handlers -isx isx_dir -msh msh_handler_dir