I am trying to install Mathcad 15. Installation fails because of a problem with the MSI file? I have installed Mathprime 6.0. When I try to install Mathcad 15, I get the message about an error encountered during the MSI installation. When I close this message window, the installation window then gives a message about Mathcad 15 installation is complete. The window with "Installation Progress" in the upper right corner says that the installation is complete. I had gotten an email that is shown below:mathcadlicensing@ptc.comAttachmentsFeb 22, 2021, 9:25 PM (23 hours ago)to meAttached, please find your requested license file for Mathcad, which enables you to run the Mathcad application.If necessary, you can now complete the installation and licensing process with this file.Save this file to any location (e.g. c:/temp or any other location of your choosing). Please be sure to remember where you saved thefile since you will need to reference it later. The file must be on the same hard drive as your installation of Mathcad. When you attemptto launch Mathcad, you will be asked to spec