Sending Email Attachement Through Outlook in R with RDCOMClient - r

Question

I'm Running a daily analysis that spits out a file I would like sent through my outlook Email. The code I used is featured here, and works wonderfully but the attachment part of it never works...
library(RDCOMClient)
OutApp <- COMCreate("Outlook.Application")
outMail = OutApp$CreateItem(0)
outMail[["To"]] = "gkinne#horizonmedia.com"
outMail[["subject"]] = "Bruh"
outMail[["body"]] = "Tester"
outMail[["Attachments"]]$Add("L:/Document.csv")
outMail$Send()
The original is here:
Sending email in R via outlook
The code works until the attachment part, and the email even sends, just with no Attachment. It spits this error out:
<checkErrorInfo> 80020009
No support for InterfaceSupportsErrorInfo
checkErrorInfo -2147352567
Error: Exception occurred.
Any Ideas?

Answer 1

Reverse the slashes and escape them.
The problem is that the path is being created in R, which prefers forward slashes (since the backslash is the escape character), but it's being interpreted by Outlook, which only takes backslashes.
For example, try adding an attachment to an Outlook email by pasting a path into the insert file dialogue, but change the backslashes to forward slashes. It doesn't accept it. And that's essentially what you're trying to do.
So reverse to make them backslashes, then add extra backslashes to each one to escape them. For example:
C:\\Users\\MyFiles\\Documents\\document.txt
R will strip out the escape characters and and pass a clean path to Outlook.

Answer 2

The answer that helped me was provided by David Arenburg in comments:
You need to specify a full path. Is L:/Document.csv a full path? Is L
a local driver or you mapped a network driver? If later is the case
you need to specify the actual network path.
Example: \\dfwcot\Home$\lando\bb8\2015-12-24 Daily Report.xlsx

Answer 3

The Add method of the Attachments class accepts four arguments. I'd suggest specifying them explicitly.
The source of the attachment can be a file (represented by the full file system path with a file name) or an Outlook item that constitutes the attachment. Make sure the file is accessible.

Answer 4

You need to do it like this
L:\\Document.csv
Worked for me. Use two backslashes.

Answer 5

I was also facing the same issue of "Error: Exception occurred".
But, in my case i was missing the naming convention of file. So, make sure that the file name must not be separated by SPACE and use delimiter as "-".

Answer 6

You can use the gsub() function to change "/" to double back slashes "\" in your path
Use this:
outMail[["Attachments"]]$Add(gsub("/","\\" ,"L:/Document.csv", fixed = TRUE))

Answer 7

The problem that our customer was facing was that they executed this operation one too many times.
In your example you are using the filename "L:/Document.csv" over and over again.
Outlook will create that attachment in one of the cache folders each time you try to generate this mail. The first one will be "Document.csv", the second one "Document (002).csv" etc...
We saw it running up to (799) and apparently that is the hard limit.
We had to clean out the temp folder in C:\Users<username>\AppData\Local\Microsoft\Windows\INetCache\Content.Outlook<random hex value> to make it work again.
Just double click an attachment in any mail and see where that temporary file shows up and check that directory.