Service no reqd to be mandatory
My client wants service no to be mandatory in Service PO .That means without service no one should not able to create the Service PO .
I made External service fields mandatory in PT9F ( Field Selection Key ) & assigned this field in Service PO document type .In SPRO
Even after that the service no field ( service Item Tab of PO ) is not became mandatory .
While creating PO system gives following message
*Please maintain services or limits .*
But if i mantain the text only even that also system accepts & allows to create the PO .
Is there any other way to make it mandatory .
Pl see & revert .