we're developing an extension of the Requests Approval Fiori scenario. We're having a hard time trying to implement new functionalities with that. Our objective is to implement a dialog to ask for an user input and then, while approving the task, forward the value to the backend. For testing we could even hardcode that, but even that way, I can't ensure the values are being transmitted.
My steps were:
1) I've copied the CA_ALL_APV application to Y_CA_ALL_APV. I've hard coded a new variable value just to simplify the process.
2) under SEGW tcode, I've extended the TASKPROCESSING service including a field to catch that variable.