Save Attachement to Delivery

Hello Experts,

is there a possibility to save a Attachment to Document, for example to a Delivery?

I have found the object 221 / Attachement 2 but my attempt failed:

<AdmInfo>            <!--multiple such elements are allowed-->            <Object>221</Object>            <Version>2</Version>        </AdmInfo>        <Attachments2_Lines>            <!--multiple such elements are allowed-->            <row>                <!--multiple such elements are allowed-->                <SourcePath>C:\temp\Out\test.pdf</SourcePath>                <FileName>test.pdf</FileName>                <FileExtension>pdf</FileExtension>                <!--<Override>tNo</Override>-->            </row>        </Attachments2_Lines>    

the Errormessage is not helpful:

<Payload status="success" id="atom3" Role="C" DImsg=" 
Exception : DI error: Invoke of: GetBusinessObjectFromXML Source: SAPbobsCOM.Company.90.0 Description: ...." 
DIresult="failure" keyvalue="" keyname="" payload="atom4" objectid="221" method="Synchronous Insert" 
b1login="Technical User" system="0010000113"/>

has anybody solved this problem?

Thanks and best Regards