BID_INCOMPATIBLE_WITH_ADGROUP API Error

This is one of the API error of Type AdGroupCriterionError in the Adwords API v2009.

I got following SOAP fault during my tool implementation, My PHP script had tried to set new MaxCPC value using the API.

[AdGroupCriterionError.BID_INCOMPATIBLE_WITH_ADGROUP @ operations[0].operand.bids; trigger:'MANUAL_CPC']

After some research I found that the Adwords' Campaign in which I am trying to set the MaxCPC value was setup for "Conv. Optimizer" in the Adwords so, Adwords not allowing me to set MaxCPC value manually through API.

I have ignored such "Conv. Optimizer" Campaigns in the script to overcome this issue.