Warning: Some deliveries selected for Ship Confirm have errors or warnings.

Hi all,
I am getting  this error massage "Warning: Some deliveries selected for Ship Confirm have errors or warnings". when i am trying to do the ship confirm in oracle order management , and the sales order line status stuck with the awaiting shipping stage , and when i go to inventory and manually perform the move order transaction then again the sales order line  still stuck with picked stage.

Let me know the steps to follow in rectifying this issue.

Regards,
Sugath Navarathna