it will probably solve my problem to do an explicit analysis. But i have few questions for you sir nwhat is that ball joint like surface ? nanother thing is how you created it ?( if any commands or how to video tutorial would be a great to understand it )nwill that ball like surface wouldn't give me a different result as it doesn'tn represent my actual geometry n4.What possibly went wrong with original model? any tips will save my time in future .nTruly, thank You for your responses and guidance n