Error "insmod: dgrp: no module by that name found" when attempting to use dgrp_gui or dgrp_cfg_node in Linux

Symptom:

The following error is seen: "insmod: dgrp: no module by that name found" when attempting to use dgrp_gui or dgrp_cfg_node to configure.

Cause:

Our driver normally places a symlink to dgrp.o in /lib/modules/default/misc. Unfortunately, modules in that directory are not loaded in RedHat 7.1.

Solution:

To solve, run: ln -s /usr/bin/dgrp/dgrp.o /lib/modules/`uname -r`/misc/dgrp.o.