regardibg fluent mesh of silencer.
 

I am a new comer for fluent as i am using CFX.I am working on gambit for some last 5 days and i am doing proj of silencer acoustic analysis.I have dividede domain of silencer in three pasrts.I will link all three volumes ones thay will be meshed.From three parts two parts have been meshed and exported to fluent successfully..The third part has some complexities.It is meshed but when i am exporting to fluent it gives the error that mesh at some face has been failes.I have try tried reduce mesh at that particular surface but still problem remains as it is.I think it may be due to some skewd elemnts are formed at that place. what may be solution to remove it.Can anybody tell me why this has been happened. Thaking you regards mehul