The commands CreatePath, SetSessionParameter, and SimpleMail are actually implemented as script components, which are included in the built-in ITP/Server script library. The script code for these script components are included as examples, in the subdirectory Examples of the directory Scripts in the ITPWork directory. ITP/Server does not use these scripts to implement the commands, they are provided as examples only.
When using these example scripts as the basis of your own script components, be aware that the scripts must be renamed. If the scripts are not renamed, then ITP/Server will not use them, because they have the same name as built-in script components, and the built-in script components take priority over user-defined script components.