How to open doc2vec trained on an older version of gensim? about gensim HOT 3 CLOSED

From your stack dump, it seems likely your console has shown you the message:

Model load error. Was model saved using code from an older Gensim version? Try loading older model using gensim-3.8.3, then re-saving, to restore compatibility with current code.

Have you tried downgrading your Gensim installation to version 3.8.3, loading your model(s), and if that succeeds, re-saving them to new file paths. Then, upgrading to current Gensim, and loading those new saves?

Note that you can install a specific older version of Gensim by specifying a version to to your usual installation command. (For example, pip install gensim==3.8.3 with pip or conda install gensim=3.8.3 with conda.)

Though: rolling back a single package can sometimes create compatibility mismatches with other related packages, so you may want to start in a fresh virtual environment and go from no-Gensim to gensim-3.8.3 (pulling in other matched packages), then move forward (or again use another fresh environment) to use current Gensim.

from gensim.

I will create a new environment with gensim 3.8.3, load and resave the older models. I was hoping there was a cleaner alternate solution, perhaps some kind of legacy parameters for older files.

from gensim.

Note that if your models are old enough, there's a chance you might need to load/save using an even-earlier version, first. (And, there may be a few other special cases of versions/modes/rare-usages that need extra work because of other once-upon-a-time bugs.)

But, 3.8.3 was the last version with a bunch of special-casing for a long range of older models, and (mostly) saves models that current-Gensim can load-forward, so should be the 1st workaround tried, and often is the only intermediate step needed.

from gensim.