Assign: Column 'Nullable (Y/N)' does not belong to table DataTable

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Hi,

There might be some invisible character b/w in the column name.
So, can you share result of the following expression using LogMessage activity etc?

 String.Join(",",dtSheet1.Columns(intIndexForTheColumn).ColumnName.Select(Function(c) AscW(c)))

note: intIndexForTheColumn is index number of the column. We can replace it with integer literal.

Regards,