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utils/io: suggest upgrade when trainer checkpoint version is too new - #1254

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glimmer-of-code:fix-trainer-checkpoint-version-error
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utils/io: suggest upgrade when trainer checkpoint version is too new#1254
glimmer-of-code wants to merge 2 commits into
metatensor:mainfrom
glimmer-of-code:fix-trainer-checkpoint-version-error

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@glimmer-of-code

@glimmer-of-code glimmer-of-code commented Aug 12, 2026

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Fix issue #857: when loading a trainer checkpoint with a newer checkpoint version than the installed metatrain, the error message now suggests upgrading metatrain, similar to the model loading path.

This improves error messages for users encountering version mismatches.


📚 Documentation preview 📚: https://metatrain--1254.org.readthedocs.build/en/1254/

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Closing to comply with one open PR policy; will reopen later.

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