“Bad marshal data” Django development server error

Question

Got this error while insterting data into my MySQL database

ValueError at /admin/arbkdb/arbkcompany/
bad marshal data (unknown type code)
Request Method: GET         


        

Answer 1

Normally in-memory operation crashes give you this kind of value error, bad marshal errors. That happens when power fails, and the appengine config files get corrupted.

For me, this problem is common, and I just directly uninstall (delete ) and re-install appengine and get back to work. Deleting .pyc files don't work sometimes.

Answer 2

Looks like is not a database problem but a corrupted files message. Removing *.pyc and *.pyo files solves this.