I have a tcl script running which goes through all the notconnect ports and sets their vlan's to a parking vlan. In the lab this runs perfect on a sup-iv 4507 running 12.2(53)SG. Trying the same script on a production 4510 Sup V-10GE causes it to fail on the ios_config command. Something as simple as: ios_config "int fa4/1" "switchport access vlan 666"
The error message I get is "%ERROR: Standby doesn't support this command"
I've definitely narrowed it to the ios_config command, but I can't find any reason this works on one and not the other.