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Look at the solution to the same error here: https://community.ptc.com/t5/Mathcad-Installation/Mathcad-14-License-Server-Error/td-p/903858
Hi JD_4477945,
Are you trying to install Mathcad Prime 1 on a new system, did you get a new license?
Did you follow the steps on the post Transferring Mathcad Single User or Student lice... - PTC Community
Thanks,
Dhiraj