AttributeError: 'GPT2Config' object has no attribute 'n_ctx' about decision-transformer HOT 6 CLOSED

@NanBorui

This issue arises due to a version mismatch in huggingface/transformers. The n_ctx attribute has been either removed or altered in the newer versions of transformers, which is causing errors in this repository that uses an older version.

As specified in conda_env.yml, installing transformers==4.5.1 should resolve this issue.

If that's not feasible, you might be able to solve it by manually altering n_ctx, referencing this commit:

huggingface/transformers@5b45422.

from decision-transformer.

Hello, I also met the same problem, may I ask you how to solve it？

from decision-transformer.

May I know how you solved this problem

from decision-transformer.

When I install transformers==4.5.1, another mistake happened "packaging.version.InvalidVersion: Invalid version: '0.10.1,<0.11'". And when I change transformers version to 4.4.2, the problem of "packaging.version" solved, but the ['n_ctx'] mistake is still alive.

from decision-transformer.

@feifei-feifei-hub try version transformers=4.12.5

from decision-transformer.

if you are using a higher version of Transformers, change n_ctx to n_positions can solve this problem

from decision-transformer.