Cisco Router 3945 Last reload reason: bus error at PC 0x475771

[z_rcmarilag@stlukes.com.ph]

Cisco IOS Software, C3900e Software (C3900e-UNIVERSALK9-M), Version 15.5(1)T2, R
ELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2015 by Cisco Systems, Inc.
Compiled Wed 27-May-15 00:34 by prod_rel_team
ROM: System Bootstrap, Version 15.1(1r)T5, RELEASE SOFTWARE (fc1)

GC-RTR-New uptime is 1 week, 3 days, 22 hours, 57 minutes
System returned to ROM by bus error at PC 0x475771 at 01:43:51 UTC Wed Jan 17 20
18
System image file is "flash0:c3900e-universalk9-mz.SPA.155-1.T2.bin"
Last reload type: Normal Reload
Last reload reason: bus error at PC 0x475771

Hi Everyone,

Our router experienced auto restart, we though it was only a power outage but upon checking we determine there is an error happened.

Error was: Last reload reason: bus error at PC 0x475771

Can anyone help us explain what is the meaning of this error code?

[marce1000]

https://www.cisco.com/c/en/us/support/docs/ios-nx-os-software/ios-software-releases-121-mainline/7949-crashes-buserror-troubleshooting.html

- Could be hardware or software related ; to verify the latter upgrade to a  gold-starred release and check if the problem persists.

M.

[Leo Laohoo]

The router is running a "T" train IOS (from a USB stick).  "T" train has a very, very high chance of being unstable in exchange for testing new modules and technologies. 

I'd recommend upgrading the IOS to a more stable "M" train.