This error means that you have no more activation remaining for the product. If the original computer with the activation on it is still available, please try to Deactivate from the Help menu in the software.
However, if you are using any of the following:
FastCAM NC
FastCAM Standard
FastCAM Professional
A FastCAM product that requires a Base + Add On License
Then you will need to get in contact with FastCAM, as those license need the base license also removed which this cannot do.
If you come across this error, and cannot remove the original activation, or are having trouble activating, please get in touch with FastCAM.
https://www.fastcam.com/new/contact.html
Or leave a message here on the forum: