Labor costing extension not able to derive functional exchange rate for costing

Hi,

We have implemented Labor Costing extension to calculate cost as per business requirement. The extension always work if rate schdule, from which extension picks the rate is in project functional currency. But when the rate schedule is in other currency (USD) and project functional currency is different, sometime  it will display the message "Rejection Cd PA_NO_PROJFUNC_C" in log file.

I check and the exchange rates are already set up in GL along with the required rate type for the exp item date. Sometime, it is able to pick the rates but at other times for similar transaction with same project, exp item date it fails. Am not been able to find any pattern in these rejections.