In previous releases, DCLGEN include files with the same names as ordinary include files had to be renamed with a DCLGEN prefix and dot (.) separator so that both types of file could be registered: ATTR.<valid extension>, for example, and DCLGEN.ATTR.<valid extension>.
You don't have to rename these files anymore. If fact, if you have the files renamed already, you should now rename them back to not have the DCLGEN. prefix.