DEC Alpha Bug Check Crash

I hadn't started this DEC Alpha 3000-300 since last summer, and booted it up so I could load the new PAK's the other day. The result was that it completes almost the entire OpenVMS startup, but then crashes with the following: %SET-I-INTSET, login interactive limit = 64, current interactive value = 0 **** OpenVMS Alpha Operating System V8.4???? - BUGCHECK **** ** Bugcheck code = 000001CC: INVEXCEPTN, Exception while above ASTDEL ** Crash CPU: 00000000??? Primary CPU: 00000000??? Node Name: A300 ** Highest CPU number:??? 00000000 ** Active CPUs:?????????? 00000000.00000001 ** Current Process:?????? DECW$STARTUP ** Current PSB ID:??????? 00000001 ** Image Name: A300$DKA0:[SYS0.SYSCOMMON.][SYSEXE]DECW$CONFIG.EXE;1 **** Starting selective memory dump at? 8-NOV-2018 21:57... The disk is a SCSI2SD board with an 8 GB SD card.? It had been running just fine, until now. Does this crash point to a hardware or software problem?