Post-includes
The post-include phase takes place during Master Template execution after Template script execution. If KCM cannot find Includes, the user is presented with a PST0005 error message and no output is produced. To generate an error document, you should do the following:
Add the setting ITPALLOWMISSINGPOSTINC=Y to the configuration file.
KCM removes the __INC statement and continues Master Template execution without throwing an error message if the subdocument cannot be included.