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%UTIL-3-DLL: Data structure error -- non-tail element contains NULL next p

I am getting the error in my 7200 vxr router where running ios is c7200p-advipservicesk9-mz.124-15.T4.bin

my observation is

when tunnel interface is going down that time i am getting this error

error is

%UTIL-3-DLL: Data structure error -- non-tail element contains NULL next pointer, -

Traceback= 0x140C170 0x3760FDC 0xE0E31C 0xE0EB80 0xE0B910 0x1A4C9FC 0x1A4CC44 0x1A5C378 0x168B05C 0x2D9298 0x1A3E854 0x1A3F110 0x2930240 0x2E5850 0x2905A30 0x2905F08


Re: %UTIL-3-DLL: Data structure error -- non-tail element contai

It does not say much !

The following are utility messages.


%UTIL-3-DLL : Data structure error -- [chars]

Explanation A software error occurred, resulting in a data structure inconsistency.

Recommended Action Copy the message exactly as it appears on the console or in the system log. Research and attempt to resolve the issue using the tools and utilities provided at With some messages, these tools and utilities will supply clarifying information. Also perform a search of the Bug Toolkit If you still require assistance, open a case with the Technical Assistance Center via the Internet, or contact your Cisco technical support representative and provide the representative with the gathered information.

Community Member

Re: %UTIL-3-DLL: Data structure error -- non-tail element contai


Will i go for a tac case.

Bz it look like a software issue

but i gonr through o/i & bug toolkit

but no luck

can you put some light on this

Community Member

hi,did you find out what was


did you find out what was causing this log message ? please let me know how it was solved. I am facing the same issue.


thank you in advance.

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