Yes, that's right. And just to confirm, I've verified that the text comment is showing up in the student's submission. So I'm at least getting all that right. But the file attachmen...

Matthew,I apologize for my poor summary of what I'm doing. It is your latter guess -- adding comments and attached files as comments to a submission.As far as I can see, I'm doing it precisel...

OK, finally had time to look into this.1) It is still odd that the submission comment says "see attachment", do a GET request on that submission with the param include[]=submission_comment...

My file is 20K.

1) Are you able to create a submission response with an attachment via the Canvas UI? Just to confirm you can perform this task in general. Yes. I assume you mean via the normal web interface, and yo...

Did you throw up your hands in hopeless resignation? I can't see where to go next.

Yes.Here's the command expressed with curl:curl -i 'https://auburn.test.instructure.com/doc/api/live/courses/NNNNNN/assignments/OOOOOOO/submissions/PPPPPPP' \ -X PUT \ -F 'commen...

Matt,This sounds interesting. When I tried a command tohttps://auburn.test.instructure.com/doc/api/live/courses/NNNNNN/assignments/OOOOOOO/submissions/PPPPPPPI got an HTML message "The requested ...

OK, finally had time to look into this.1) It is still odd that the submission comment says "see attachment", do a GET request on that submission with the param include[]=submission_comment...

My file is 20K.