Material withdrawal and material shipment must be confirmed separately

Hi All,

We have done configuration for confirmation in two steps:

ie seperate pick and transfer.

But the problem is when I press enter in LT12 transaction,I am getting a warning message only-"Material withdrawal and material shipment must be confirmed separately".

Now my requirement is to have an error message here instead of warning message , which will not allow me to go inside the transaction.

Please help me.