How can I tell WHY an Interface is in warning?

I have one "problem" etherchannel - according to SolarWinds.  Supposedly, the L2 etherchannel port between two switch stacks "flaps" between warning and up.  However, if I go into the switches, the physical ports are running clean with no errors, the etherchannel port is clean with no errors, and LACP is clean with no errors.  Cisco side, says nothing is wrong.

How can I actually drill into the SolarWinds and find out why it is saying the interface in Warning - did it get a trap?  Did it get a syslog?  Because there's NO indications of any problems (traps or syslog) except for the event.