A piece of data installed to your License Server that allows you to run a specified number of Houdini products.

A workstation, or node-locked, License is installed to the same computer running the Houdini product. A floating, or network, License is installed to a dedicated license server and the computers that run Houdini products will point to it.

Users sometimes mistake a License for a Token. A license just means that you are allowed to serve/use a certain product. A License contains one or more Tokens, permitting that number of copies of that product to run at the same time on different machines. Workstation licenses always have 1 token.

For example a License of Houdini FX may have 10 tokens, meaning this particular License of Houdini FX may be used on 10 machines simultaneously.

There are several types of licenses:

• Server license
  This allows the machine to serve licenses. This is automatically generated when a Product license is installed for the first time.
  This license begins with the SERVER keystring.
• Product license
  This is the main type of license, which can be for any of the Houdini products. The license includes a token count, IP mask and expiry date, among other things.
  This license begins with the LICENSE keystring.
• Upgrade license
  This upgrades an existing product license to a newer version of Houdini. e.g. upgrade 9.0 to 9.1
  This license begins with the UPGRADE keystring.
• Extension license
  This extends the expiry date of an existing license to another date sometime in the future.
  This license begins with the EXTEND keystring.