- Are you using a Custom SQL by any chance?
- Do you have a filter for 'Buyer State' in your viz?
- What Tableau version are you using?
Looks like you are hitting this: Error "ORA-29275: partial multibyte character" When Extracting or Viewing Data
Plus there's this: ORA-29275: partial multibyte character
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Are you using customSQL?
Could you please check what character set is your database? you can use the below command..
select * from nls_database_parameters where parameter='NLS_CHARACTERSET';
I am assuming that this is mainly because of the character set used.
Also look at Mark Fraser response in this thread it will help you o resolve the problem.Oracle database error 12154: ORA-12154: TNS:could not resolve the connect identifier specified
I think this problem is arised from oracle so See references like:
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Finally this query helped me.
convert (Col_name,'US7ASCII','WE8ISO8859P1') as new_col_name,
Thank you guys.