NavData Center MSFS giving error message when trying to update

[Ian]

Hi…,

Welcome.

EPERM means that the application cannot access something because of lacking privileges. Have you installed into default locations?

Try deleting all files in C:\Users\yourusername\AppData\Local\Temp, and restarting machine.

See also Can't Install AIRAC Cycle or Navigraph Charts in Game - EPERM operation not permitted - #5 by rscarter

Cheers
Ian