CODEWITHSUNDEEP
c#outlookmsg
John Linton
John Linton

Reputation: 309

C# creating an .msg file --> Cannot start Microsoft Outlook error

I am working in C# and I created an .msg file (more like reconstituted one) after having read it out of Exchange and made it downloadable from a website.

However even though all that works just fine, when I try to open the .msg file, I see this error: "Cannot start Microsoft Outlook. We can't open ------.msg It's possible the file is already open, or you don't have permission to open it."

The same error occurs in Chrome or in IE, regardless of whether Outlook is open. Further it occurs even though the read permissions are permitted on the file. I have Outlook 2016 and found this link but no real help:

https://www.add-in-express.com/forum/read.php?FID=5&TID=13956

Anyone else have this issue or thoughts on how to resolve?

Upvotes: 1

Views: 1185

Answers (1)

Dmitry Streblechenko
Dmitry Streblechenko

Reputation: 66286

It sure sounds like you really have a MIME file (extension should be .eml) rather than an MSG file (which is a binary OLE storage file). Open in Notepad your file and an MSG file created by Outlook to compare the two.

Upvotes: 1

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