rlm_sql_getvpdata: database query error

[Delcamp, Christopher D CTR SPAWAR SSC LANT, 50DE]

We are implementing 802.1x authentication with MAB (Mac Address Bypass) on our Cisco switches and are getting some freeradius errors.  Just as a note, when using MAB the username and password given to radius is the MAC address of the device (workstation, server, printer, etc) that is attempting to connect to the network.  The authentication succeeds, but I'm wondering what these errors mean and if they can be fixed.  Here is a sample of the radius.log.

Thu Mar 26 09:08:08 2009 : Error: rlm_sql_getvpdata: database query error
Thu Mar 26 09:08:08 2009 : Error: rlm_sql_getvpdata: database query error
Thu Mar 26 09:08:08 2009 : Auth: Login OK: [001b63933f59/001b63933f59] (from client technet port 50232 cli 00-1B-63-93-3F-59)
Thu Mar 26 09:16:03 2009 : Error: rlm_sql_getvpdata: database query error
Thu Mar 26 09:16:03 2009 : Error: rlm_sql_getvpdata: database query error
Thu Mar 26 09:16:03 2009 : Auth: Login OK: [000c29604a22/000c29604a22] (from client technet port 50246 cli 00-0C-29-60-4A-22)
Thu Mar 26 09:19:35 2009 : Error: rlm_sql_getvpdata: database query error
Thu Mar 26 09:19:35 2009 : Error: rlm_sql_getvpdata: database query error
Thu Mar 26 09:19:35 2009 : Auth: Login OK: [00188b0251ba/00188b0251ba] (from client technet port 50246 cli 00-18-8B-02-51-BA)

Thanks in advance for any help I can get.

Chris Delcamp