Error while editing bar chart

Question

Hi,

I can't modify the structure of a bar chart. An error message is displayed: 

Comments

Hi Rahama,

have you changed the dataset behind that chart? I mean, have you deleted columns it was using?

Regards,

Nunzia

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No, and i have the same error whith other chart

Answer 1

Ok so when does it happen? I mean, you created your chart, saved and exit. Then you enter the document and try to modify the chart? Thanks,

Nunzia

Answer 2

Yes, i create the chart, i tried both of them (save and don't save), i do some selections, a prompt is displayed "unable to load data" and when i return to edit the chart, it shows to me this error

Answer 3

Also i can't save my work and when i quit my workspace it shows this error: