I just looked into the messages.0 and found a lot of info but don't understand the errors. One thing I do see is that the problem starts with a cpu0 error and then I never see cpu0 re-initailize plus at the very end of the log its states "I have pasted the message below:
Dec 8 16:38:08 eliot unix: WARNING: [AFT1] EDP event on CPU0 Instruction access at TL=0, errID 0x000f726e.daa3dec6
Dec 8 16:38:08 eliot AFSR 0x00000000.00400001<EDP> AFAR 0x00000000.67ffedf8
Dec 8 16:38:08 eliot AFSR.PSYND 0x0001(Score 95) AFSR.ETS 0x00 Fault_PC 0xff01ede0
Dec 8 16:38:08 eliot UDBH 0x0000 UDBH.ESYND 0x00 UDBL 0x0000 UDBL.ESYND 0x00
Dec 8 16:38:08 eliot unix: [AFT2] errID 0x000f726e.daa3dec6 PA=0x00000000.67ffedf8
Dec 8 16:38:08 eliot E$tag 0x00000000.0e400cff E$State: Shared E$parity 0x07
Dec 8 16:38:08 eliot unix: [AFT2] E$Data (0x38): 0xd0066014.81c7e088 *Bad* PSYND=0x0001
Dec 8 16:38:08 eliot unix: [AFT2] errID 0x000f726e.daa3dec6 AFAR was derived from E$Tag
Dec 8 16:38:08 eliot unix: NOTICE: Scheduling clearing of error on page 0x00000000.67ffe000
Dec 8 16:38:11 eliot unix: NOTICE: Previously reported error on page 0x00000000.67ffe000 cleared
Dec 8 16:38:11 eliot unix: [AFT3] errID 0x000f726e.daa3dec6 Above Error is in User Mode
Dec 8 16:38:11 eliot and is fatal: will reboot
Dec 8 16:38:11 eliot unix: WARNING: [AFT1] initiating reboot due to above error in pid 20915 (sdtperfmeter)
Dec 8 16:38:18 eliot syslogd: going down on signal 15
Dec 8 16:38:21 eliot /usr/dt/bin/ttsession[20906]: child (24101) exited due to signal 1
Dec 8 16:39:36 eliot unix: syncing file systems...
Dec 8 16:39:37 eliot unix: done
Dec 8 16:41:16 eliot unix: ^MSunOS Release 5.7 Version Generic_106541-16 64-bit [UNIX(R) System V Release 4.0]
Dec 8 16:41:16 eliot unix: Copyright (c) 1983-1999, Sun Microsystems, Inc.
Dec 8 16:41:16 eliot unix: Ethernet address = 8:0:20:d8:ed:15
Dec 8 16:41:16 eliot unix: mem = 1048576K (0x40000000)
Dec 8 16:41:16 eliot unix: avail mem = 1029095424
Dec 8 16:41:16 eliot unix: root nexus = Sun (TM) Enterprise 250 (2 X UltraSPARC-II 400MHz)
______I TOOK OUT SOME UNINTERESTING INFO HERE__________
Dec 8 16:41:25 eliot unix: PCI-device: TSI,gfxp@2, gfxp0
Dec 8 16:41:25 eliot unix: gfxp0 is /pci@1f,4000/TSI,gfxp@2
Dec 8 16:41:25 eliot unix: TSI: gfxp0 is GFX8P @ 1152x900
Dec 8 16:41:25 eliot unix: stdout is </pci@1f,4000/TSI,gfxp@2> major <153> minor <0>
Dec 8 16:41:25 eliot unix: cpu0: SUNW,UltraSPARC-II (upaid 0 impl 0x11 ver 0xa0 clock 400 MHz)
Dec 8 16:41:25 eliot unix: cpu1: SUNW,UltraSPARC-II (upaid 1 impl 0x11 ver 0xa0 clock 400 MHz)
Dec 8 16:41:25 eliot unix: cpu 1 initialization complete - online
Dec 8 16:41:25 eliot unix: se0 at ebus0: offset 14,400000
Dec 8 16:41:25 eliot unix: se0 is /pci@1f,4000/ebus@1/se@14,400000
Dec 8 16:41:25 eliot unix: se1 at ebus0: offset 14,200000
Dec 8 16:41:25 eliot unix: se1 is /pci@1f,4000/ebus@1/se@14,200000
Dec 8 16:41:26 eliot unix: SUNW,hme0: CheerIO 2.0 (Rev Id = c1) Found
Dec 8 16:41:26 eliot unix: PCI-device: network@1,1, hme0
Dec 8 16:41:26 eliot unix: hme0 is /pci@1f,4000/network@1,1
Dec 8 16:41:29 eliot unix: SUNW,hme0: Using Internal Transceiver
Dec 8 16:41:29 eliot unix: SUNW,hme0: 100 Mbps full-duplex Link Up
Dec 8 16:41:52 eliot unix: dump on /dev/dsk/c0t0d0s4 size 1026 MB
Dec 8 16:42:01 eliot named[141]: starting. in.named BIND 8.1.2 Thu Mar 22 20:49:48 PST 2001
Dec 8 16:42:01 eliot Generic 107018-03-5.7-September 1998
Dec 8 16:42:03 eliot unix: pseudo-device: pm0
Dec 8 16:42:03 eliot unix: pm0 is /pseudo/pm@0
Dec 8 16:42:04 eliot unix: pseudo-device: devinfo0
Dec 8 16:42:04 eliot unix: devinfo0 is /pseudo/devinfo@0
Dec 8 16:42:05 eliot unix: pseudo-device: vol0
Dec 8 16:42:05 eliot unix: vol0 is /pseudo/vol@0
Dec 8 16:43:29 eliot snmpdx: unable to get my IP address: gethostbyname(eliot) failed [h_errno: host not found(1)]