@joyaljp Thanks much for the detail. I have tried that but it did not worked. the error was "Request failed : Disable AP before configuring country code"This issue got fixed now, To change the country code on the Access point I have "disabled" the ac...

@joyaljp  Do you mean we need to disable the 802.11a/n/c and 802.11b/g/n Admin Status of the AP and try changing the AP country code ?  or do we need to disable this on the WLC Global parameter and uncheck the Enabled option for 802.11a and 802.11b/g...