Recocile SC Challan

Dear friends,

Please Help me.

1.when I reconcile SC challan with ref. to GR docu. I enter the relevent SC challan then system issuing error messege- <b>Challan not valid, Material doc. is valid for another scenario</b>.

2.can anybody tell me whether the accounting Document is generated for Transfer posting to SC using MB1B Mvt 541.

Regards,

Chetan