There is a bug in the matching of a manufacturer to their SNMP Enterprise ID.
To fix this without waiting for the next release, edit the file
Linux -
/usr/local/open-audit/code_igniter/application/helpers/snmp_oid_helper.php
Windows -
c:\xampp\open-audit\application\helpers\snmp_oid_helper.php
Change line 54072 from:
return ($new->manufacturer);
to
return ($manufacturer);
Apologies for the inconvenience.