http://www.cisco.com/c/en/us/support/docs/switches/catalyst-6500-series-switches/24053-193.htmlrun show diagnostic events
if see. TestErrorCounterMonitor
The TestErrorCounterMonitor has detected that an error counter in the specified module has exceeded a threshold. This message contains specific data about the error counter, including the ASIC and register of the counter, and the error count.
This error message is received when an ASIC on the linecard receives packets with a bad CRC. The issue may be local to this module or may be triggered by some other faulty module in the chassis.
The reason for this error can be because the newly inserted module was not firmly inserted.
Reseat the module in order to resolve the problem.