adding attachment in sendmail script where attachment is in a CRM field

adding attachment in sendmail script where attachment is in a CRM field

Hi all,

I have a custom field of type 'File Upload' in one of my modules in my CRM. I want to include the file in that field as an attachment to an email - which is done from a button on  the 'Results' module.

I have created a script and a button to initiate an email from that module. The Deluge scripting window has allowed me to add arguments for all the fields I need to use except for the one file upload type field. My script currently looks like the below (content of the email omitted). As you see I've tried to add the argument for the field in the system called "Scan PDF" - the rest of the script is executing fine - but the attachment is not appearing, can anyone help ? 

To be clear - the file is sitting  in the field named, in the module within CRM which the function is executing from. I've tried to follow the standard guidance but it seems to not include this case.

ResultIDLong = ResultID.tolong();
ResultDetails = zoho.crm.getRecordById("Results",ResultIDLong);
ScanPDF = ResultDetails.get("Scan PDF");
sendmail
[
      from :zoho.adminuserid
to :Email
bcc :bcc address
reply to :replytoaddress
subject :"Results from your" + Resulttype
message : ....
       Attachments :file:ScanPDF
];
return "Customer Scan Email has been sent";

many thanks
Owen