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New Member

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

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

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

Please help me out from this problem

New Member

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

one more thing i observe

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

New Member

%UTIL-3-DLL: Data structure error -- non-tail element contains N

Hi, can you resolve the problem?

New 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.


%UTIL-3-DLL: Data structure error -- non-tail element contains N

Error message decoder results:

1. %UTIL-3-DLL: Data structure error -- %s A software error occurred, resulting in 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. Search for resolved software issues using the Bug Toolkit at If you still require assistance,  open a case with the Technical Assistance Center via the Internet at, or contact your Cisco technical support  representative and provide the representative with the information you have gathered. Attach the  following information to your case in nonzipped, plain-text (.txt) format: the output of the show  logging and show tech-support commands and your pertinent troubleshooting logs.

Related documents- No specific documents apply to this error message.