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Hello @najaregu,
Do you have backup files for the original file?
Try clicking the Application menu(or F1)> Drawing Utilities > Open the Drawing Recovery Manager. Find
Then select the file to recover.
If it does not resolve it try Recovering drawing files which fail to open in AutoCAD or the other suggestions located here.
Please "Accept Solution" if a reply or replies have helped resolve the issue or answered your question, to help others in the community.

Natasha
Community Product Support Specialist
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