Archiving an email in SuperOffice created by a CRM Script

Hi,

I am sending an email from SuperOffice via a CRM Script (pretty basic code below, but in my full code I am also using reply templates, and the parser variables).

//Send Email
Email email;
email.setValue("to", toEmailAddress);
email.setValue("subject", subject);
email.setValue("bodyHtml", bodyHtml);
email.send();

I now want to archive that email in SuperOffice, so that it looks like a standard SuperOffice archived email, I.E. I can see values in the email to field, email subject, and email body.

At this point, I cannot even seem to set the email body, with the code I have below not working (based on the AI results produced from SuperOffice Docs).

NSDocumentAgent agent;
NSDocumentEntity doc = agent.CreateDefaultDocumentEntity();

// set properties (name, contact, etc.) on doc

//Set Document Template
NSDocumentTemplate docTmpl;
docTmpl.SetDocumentTemplateId(154);
doc.SetDocumentTemplate(docTmpl);

//Set Document Heading
doc.SetHeader("Demo");

//Set Document Filename
doc.SetName("POC " + getCurrentDateTime().toString("YY2MM2DD2HH24MI2SS2") + ".somail");

//Save Document
doc = agent.SaveDocumentEntity(doc);

NSStream stream;
stream.SetStream(bodyHtml.toByteArray());
doc = agent.SetDocumentStream(doc, stream, true);

The code does not error when I run it, but I do then get an error when trying to open the archived email that the CRMScript has created.  I haven't even got to the point of looking to set the email to address and subject.

Is it possible to archive an email via CRMScript that was created using the Email agent?

Many thanks,

Trevor