====== SetTargetDocumentFrameSystemPartnerByTNr ======

The function //SetTargetDocumentFrameSystemPartnerByTNr()// sets the system partner at the target document.

The passing parameter is the Tnr of the partner to be set.

==== Syntax: ==== 

<code>SetTargetDocumentFrameSystemPartnerByTNr(PartnerTnr)</code>

**Caution:** This determines the system partner in the target message.