report_purchase_order is not generating

Hello Nathan,

when I try to generate perp_ap>>reports>>report_purchase_order, selecting a supplier and one of his invoices, it generate a document with this:

TinyButStrong Error in field [order.our_contact.n_fn...] : item before 'n_fn' is neither an object nor an array. Its type is NULL. This message can be cancelled using parameter 'noerr'.
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Can you help me?