It's hard to say for certain without more details, but here's some speculation as to the error you're seeing (not including the warnings that someone else has noted).

First of all, the MIME Parser is blowing up while parsing the message that you piped it, and is then printing out the details, as it's coded to do.

The question is why it's blowing up - and that's what's not clear. According to this debug, it appears to have gotten as far as selecting a disk file to hold the first MIME part of the message, then it dies.

Could this be a file permission problem? Could the script be running as a user who does not have permission to write in the current working directory? You could solve this in multiple ways - you can tell the MIME parser to parse in core memory, or you can specify a writable directory to use for the temp files, or you can change permissions on the current working directory.

In any of these cases, you've got a bit of work to do - and, it sounds like, a bit of reading. There's no easy answer - you need to digest the MIME-tools documentation.

Good hunting.

Peace,
-McD