Position Cursor on Field

Hi All,

I have a requirement to check if the field Delivery Note has a value when doing goods receipt via MIGO or MIGO_GR. If this field has a value, the system should issue an error message and the cursoe should be positioned in that field so that the users will know that they need to fill it in. My question is how will I make the cursor go to that field given that this is not a required field in MIGO?

Thanks,

Jim