Blank Service Entries

Hi,

When entering a Service entry in ML81N, the user can enter the PO number, click 'other PO button'. Then without entering a service or adopting a service the user licks save and the systems create a SE entry with no services.

I am looking at a way to stop the users from doing this. I thought of making the Service number field mandatory.

Any suggestions will be appreciated.

Thanks.

GA