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The Python error '''"AttributeError: 'NoneType' object has no attribute..." ''' probably means that you the Gramps program attempted to retrieve an object (such as a person, or family) by using its internal handle, but the database can't find it. Likely, the object is still there, but the internal database references have gotten become corrupted.
To fix, first, '''[[How_to_make_a_backup|make a Gramps XML backup]]'''.
Then, you need to run the menu -> Tools -> Family Tree Repair and run the tools:
If you still have issues, you may need to go back to an older backup.
[[Category:Documentation]][[Category:Developers]][[Category:Troubleshooting]]
