Because Mathcad 15 is , PTC no longer sells new licenses directly. You may find:

This is a mandatory requirement; without it, the installer will fail with an error. License File Application: The license setup is typically handled via the mclicense.exe utility found in the installation folder. Operating System:

Version 15 features seamless integration with Microsoft Excel and Pro/ENGINEER (now Creo). You can pull data from spreadsheets or drive 3D model dimensions directly from your math. Critical Considerations for Downloading

"Progress isn't always forward, kid," Jim said, shutting down his own station. "Sometimes you gotta go back to the classics to get the job done."

issue new licenses or provide access to software downloads for this version. Mathcad Prime Licenses