#1

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.

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.