Solved
Creating WT Documents using Info* Engine Task
How can I construct an Info* Engine Task to create a document and add attachments or content to it?
From "Help Center" - "Using the Info*Engine Task Editor": https://support.ptc.com/help/windchill/r12.1.2.0/pt_BR/index.html#page/Windchill_Help_Center/IEUsersGuide/IEUG_IETasksUseEditor.html