Bus error exceptions can be caused in these instances:
Usually, a boot loop caused by a bus error exception is hardware related.
To resolve this issue, perform these steps:
For minimum versions of Cisco IOS Software needed for the hardware, refer to Software Advisor.
Perform these steps:
If you notice the problem immediately after upgrading the Cisco IOS Software, perform the steps in the Software Failure section of Troubleshooting Bus Error Crashes.
When hardware replacement is indicated, choose from one of these options:
*** System received a Bus Error exception ***