Why am I getting Error [18] and Error (-602) after revoking the licenses?

This error occurs when the products are run five days after revoking part of the licences or all licenses.

When running a RMS secured product (for example, AVEVA E3D Design), the following error is displayed:

Error[18]: No license code is available for feature UNKNOWN on host localhost.

The license server appears to be up and running, but once the file RevokeRequest.xml is created and placed in the folder: C:\Program Files (x86)\AVEVA\AVEVA Licensing System\RMS, any products will cease to run after five days.