Frequent Model Upload Error

Recently, I have received the following response.
exception 'OAuthException' with message 'Invalid auth/bad request (got a 401, expected HTTP/1.1 20X or a redirect)'
Upload success rate is almost under 10%.

I would like to ask you to check this issue.

Thanks,

JC

Solved.
I changed my consumer key/secret and token/secret. Now there is no problem.