I have an already existing updated MPP with the project and want to upload it in HP PPM. Can you please let me know if this possible or I have to create a new project plan. Will this update the graphs related to the task plan.
To understand it correctly, you have the PPM Workplan, that was synced with an MPP. Now, you updated the MPP and want to bring the changes into PPM, is that correct? I would say, if its only for one workplan, then the easiest option would be modify the updates directly into PPM, because other alternates are there but can become a bit lengthy and difficult than making updates into PPM directly. Once that is done, then simply re-sync with your updated MPP and it should be fine.