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unexplained syslog message

any one got an explanation for the following syslog message :

"%IPC-2-NO_ACK_HANDLER: No handler for ACK with data."

This is reporeted based on the following informations:


IOS (tm) RPM Software (RPM-JS-M),

Version 12.1(5)T7, RELEASE SOFTWARE (fc1)


cisco RPM (NPE150) processor with 98304K/32768K bytes of memory.

R4700 CPU at 150Mhz, Implementation 33, Rev 1.0, 512KB L2 Cache


Re: unexplained syslog message

This is what I see from Output interpreter.

1. %IPC-2-NO_ACK_HANDLER: No handler for ACK with data.

A preview function appended data to an acknowledgment at the sender, but there is no corresponding acknowledgment handler at the receiver.

Recommended Action: Copy the error message exactly as it appears on the console or in the system log. Issue the show tech-support command to gather data that may help identify the nature of the error. If you cannot determine the nature of the error from the error message text or from the show tech-support command output, contact your Cisco technical support representative and provide the representative with the gathered information