The transport control program tp offers you online help that can be accessed at three different levels:

• To get a brief overview of the most important tp commands, including a reference to the second level, call tp without any arguments .
• The call tp help creates general syntax information for tp calls. You also receive a list of all tp commands and a reference to the third level.
• To display a description of the syntax and of this command function ( <command> must be a valid tp command), call tp with tp <command> .

To find out the meaning of a particular tp return code, call tp with tp explainrc <rc> .