Did you actually read the error message you were getting?
Software error: CGI open of tmpfile: Read-only file system

If you upload a file, CGI tries to open a temporary file. That fails because the file system that CGI uses for temporary files is mounted as read-only.

So, mount your file system as rw, and all is fine.

In reply to Re: software error regarding as described below by moritz
in thread software error regarding as described below by ketaki

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