Regarding Source List

Dear Expert,

Here I am getting error "Source not included in list despite source list requirement " at the time of P.O Creation.

I maintained Source List at Plant Level, and i did all the settings and Prerequisite. Still i am getting same Error.

I searched all the forum Inquiry.

For your more clarification:

I did same setting in sand Box 250 Client, there scenario run Properly without giving Error, but in DEV Server Client 400 same

setting i did, but there i am getting Error.

Can any body Help Me.

I already Maintained Source list with Plant, Material, Vendor and Date Combination.

Can anybody Help me.........................