Error: There was a problem loading the activation library



The following error messages may occur when upgrading from an older version of Lumerical software. Typically it is possible to simply install the new version without manually un-installing the older version first. However, in some cases the automatic un-install fails, resulting in these errors.

There was a problem loading the activation library. Code 6.

Such problems can be resolved by:

  1. Close the error message by selecting ‘NO’.
  2. Open the Control Panel > Programs and features, and un-install the software (ie. FDTD Solutions)
  3. Go to C:\Program Files\Lumerical\ and ensure the product folder (i.e. FDTD) has been removed.
    If it is still present, delete the entire folder.
  4. Reboot your computer
  5. Re-install the new version of the software.

FDTD.exe is not running