Line 543 FatalError()

I have a 5700sm, that seems to like to reset do to this error, Line 543 FatalError(), any insight would be great

What was the event line immediately beneath that message?

External Hard Reset WatchDog
12:00:20 UT : 03/24/01 : File root.c : Line 941 System Startup
12:00:20 UT : 03/24/01 : File root.c : Line 946 Software Version : CANOPY 7.3.6 Oct 24 2005 12:06:56 SM-DES
12:00:20 UT : 03/24/01 : File root.c : Line 950 Software Boot Version : CANOPYBOOT 3.0
12:00:20 UT : 03/24/01 : File root.c : Line 956 FPGA Version : 070605
12:00:20 UT : 03/24/01 : File root.c : Line 960 FPGA Features : DES Sched
12:09:38 UT : 03/24/01 : File C:/ISIPPC/pssppc.250/bsps/devices/whisp/syslog.c : Line 1062 Time set
22:30:39 UT : 03/25/01 : File C:/ISIPPC/pssppc.250/bsps/devices/whisp/nibuf.c : Line 543 FatalError()
22:30:20 UT : 03/25/01 : File C:/ISIPPC/pssppc.250/bsps/devices/whisp/syslog.c : Line 1062 Time set
22:30:20 UT : 03/25/01 : File C:/ISIPPC/pssppc.250/bsps/devices/whisp/syslog.c : Line 918 System Reset Exception – External Hard Reset WatchDog
22:30:20 UT : 03/25/01 : File root.c : Line 941 System Startup
22:30:20 UT : 03/25/01 : File root.c : Line 946 Software Version : CANOPY 7.3.6 Oct 24 2005 12:06:56 SM-DES
22:30:20 UT : 03/25/01 : File root.c : Line 950 Software Boot Version : CANOPYBOOT 3.0
22:30:20 UT : 03/25/01 : File root.c : Line 956 FPGA Version : 070605
22:30:20 UT : 03/25/01 : File root.c : Line 960 FPGA Features : DES Sched
22:31:28 UT : 03/25/01 : File C:/ISIPPC/pssppc.250/bsps/devices/whisp/syslog.c : Line 1062 Time set
23:49:05 UT : 03/25/01 : File C:/ISIPPC/pssppc.250/bsps/devices/whisp/syslog.c : Line 1062 Time set
21:08:20 UT : 03/30/01 : File C:/ISIPPC/pssppc.250/bsps/devices/whisp/nibuf.c : Line 543 FatalError()
20:58:49 UT : 03/30/01 : File C:/ISIPPC/pssppc.250/bsps/devices/whisp/syslog.c : Line 1062 Time set
20:58:49 UT : 03/30/01 : File C:/ISIPPC/pssppc.250/bsps/devices/whisp/syslog.c : Line 918 System Reset Exception – External Hard Reset WatchDog
20:58:49 UT : 03/30/01 : File root.c : Line 941 System Startup
20:58:49 UT : 03/30/01 : File root.c : Line 946 Software Version : CANOPY 7.3.6 Oct 24 2005 12:06:56 SM-DES
20:58:49 UT : 03/30/01 : File root.c : Line 950 Software Boot Version : CANOPYBOOT 3.0
20:58:49 UT : 03/30/01 : File root.c : Line 956 FPGA Version : 070605
20:58:49 UT : 03/30/01 : File root.c : Line 960 FPGA Features : DES Sched