Confirm that Mode: is set to Network, click Read. Open the Start Menu, Programs, Mastercam 2019 for SOLIDWORKS, NHasp X If it is set to Default, HASP, or Software, change it to NetHASP, click the + icon to apply the setting, click the checkmark icon to close the window. Confirm that the 'License to search for at Startup' is set to NetHASP. In the Mastercam Advanced Configuration window, select License Search at Startup Open the Start Menu, Programs, Mastercam 2019 for SOLIDWORKS, Advanced Configuration

Close all running instances of SOLIDWORKS If Mastercam still fails to open, then try the following: You do not need to be an admin even though the message states 'to continue, enter an admin user name and password.' If you click No or cancel the prompt, it will keep reappearing until you type your password and click Yes. If at any time a User Account Control window for 'CodeMeter Runtime Server' appears when launching Solidworks or MasterCam, please enter your password and click Yes. If it is, uncheck both checkboxes, click OK to apply the settings, close and reopen SOLIDWORKS, then confirm that SOLIDWORKS CAM 2019 is not running.

In SOLIDWORKS Add-Ins, please ensure that SOLIDWORKS CAM 2019 is not active and not set to start up.

Mastercam for solidworks 2019