http://kixtart.org/KiXtart is a free-format scripting language and has rich built-in functionality for easy scripting. It supports COM (providing access to ADSI, ADO, WMI, etc) and thus is easily extensible.

When using the INGROUP function KiXtart caches the names of AD groups.

When a group is renamed, the cache needs to be cleared for the INGROUP function to work with the new name.

To force this at every run of the script, use the /f parameter to kix32.exe:

kix32.exe /f scriptfile.kix

Source:Active-Directory-FAQ - Kix Script – After renaming an AD group InGroup does not work anymore