Community Tip - You can subscribe to a forum, label or individual post and receive email notifications when someone posts a new topic or reply. Learn more! X
Did you try as described here (For Prime 6, but should be the same for Prime 9): https://community.ptc.com/t5/Mathcad-Installation/How-to-Acquire-Mathcad-Prime-30-days-License-for-Mathcad-Prime/m-p/706367#M15
Success!
Luc