How to call automatic transaction launcher in activity guided

Hi experts,

I have a guided activity with 5 steps, four process steps and the last step is to call a transaction launcher automatically. Is there any way to make the automatic call this transaction launcher in step 5?

Call the transaction launcher works by button, but does not meet my requirement would be the automatic display of the transaction launcher.

• Tests performed

I made the call from the transaction launcher in the following methods of view and in all cases there has been no error, but the transaction launcher also was not called.

 DO_INIT

 DO_INIT_CONTEXT

 DO_PREPARE_OUTPUT

The also called the TL in DO_PREPARE_OUTPUT method of guided activity, but also had no effect.

I tested the call of the event button to simulate button action but did not occur to call TL (Maybe called at the wrong time).

Anyone ever had this problem or has an idea to solve this problem?

Code for button event:

Thanks!