ERROR ETHERCHANNEL WHEN CONFIGURE SPAN

[CongNC1]

Hi everybody

I have a switch cisco catalyst 4500X

After I configure SPAN command: monitor  session 1 source vlan 16, 17 , 19 apper error any interface auto leave port channel.

Apr 4 14:27:52: %PARSER-5-CFGLOG_LOGGEDCMD: User:ABC logged command:monitor session 1 source vlan 16 , 17 , 19
Apr 4 14:27:58: %EC-5-UNBUNDLE: Interface Te1/1/15 left the port-channel Po11
Apr 4 14:27:59: %EC-5-UNBUNDLE: Interface Te2/1/15 left the port-channel Po11

Everybody explain for my cause why error?

Thank you

[Mark Malone]

Hi
what version are you on , did you check the release notes fro any known bug that matches ?
usually that happens on an ether channel only if the actual member port is added as a source its removed from the group