If you use a $varFilePath to create the PDF, it can be used to also "read" (and Insert into Container field).
I do this for a client that want's a PDF of a test form to "archive" as historical document.
You should always use a variable for filepath (include directories as calculated path in the Set Variable). This can be used so many way, including the container and as attachment in emails.
If you use the Get (TemporaryPath)
then you need to use it in the same script as it's deleted when FMP is stopped.
Also study the use of variables and file paths if this is on the Server (scheduled or PSoS).