Creo ModelCHECK > Configuring PTC Creo Modelcheck > Setting Up the Start Configuration File > Setting Up External Files > Custom Configurable Checks > About Creating Custom Checks
  
About Creating Custom Checks
You can create your own checks in addition to the checks that Creo ModelCHECK provides. To do this you must use Creo Parametric TOOLKIT to enable the checks and accordingly update the Creo ModelCHECK configuration files.
 
* You must have a valid Creo Parametric TOOLKIT license to write Creo Parametric TOOLKIT applications. See the Creo Parametric TOOLKIT documentation for information about the licenses and their use.