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It works, but when I use command lines I have to write a option of a integer list in which each one sends a message for different actions, for example 1 writes hello world, 2 writes have a nice day and 3 writes goodbye.

My command line is something like this

$ rostopic pub -1 /pkg_topic /pkg_executable_file/Message -- 1 "none"

So I write the launch file like this

<node pkg="rostopic" type="rostopic" name="arbitrary_name" args="pub /pkg_topic pkg_executable_file/message > -- 1 " output="screen"/>

When I try to add the last two commands the window closes.

It works, but when I use command lines I have to write a option of a integer list in which each one sends a message for different actions, for example 1 writes hello world, 2 writes have a nice day and 3 writes goodbye.

My command line is something like this

$ rostopic pub -1 /pkg_topic /pkg_executable_file/Message -- 1 "none" 
"none"

<node pkg="rostopic" type="rostopic" name="arbitrary_name" args="pub /pkg_topic pkg_executable_file/message > -- 1 " output="screen"/>output="screen"/>