Cancellation of Shipment in Transfer Orders

Hi Friends,

Can any one suggest me regarding Cancellation of Shipment.

For Example ..   I have created  Transfer Order with Qty : 10  ,  From Ware House = "Hyderabad" And To Ware House = "Bang" .Then i posted Picking list , Picking-list registration And Finally I made Shipment also with Qty : 10.

My Question is ...I want to Cancel the shipment posting.  suppose if i Cancel shipment again it should be able to shipment.

So please suggest me in this situation how can i proceed . !Thanks

Regards

Ramesh.P