We recommend using the newest maintenance release of this version, 2018.3.11, which contains additional fixes.
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When connecting to a PostgreSQL database, an "Unrecognized return value from copy_and_convert_field" error sometimes occurred.
When you copied a sheet to a new workbook, the value list from a string parameter would not copy over and the parameter would be empty.
After upgrading to Tableau 2018.3, views based on an MSAS data source sometimes took much longer to load.
When you published a data source which used Custom SQL to alias a field name to the same name as the data source, calculations using that field lost reference to the field, becoming invalid.
When connecting to a Sharepoint list, sometimes the following error occurred: "An error occurred while communicating with the SharePoint Lists data source"
When connecting to Tibco tables without a specified catalog, a "The table... does not exist" error occurred.
EXCLUDE LOD displayed different results depending on whether "DATEPART" function was upper or lower case.
When changing a parameter that was based on a nested LOD expression, an unexpected "No such column" error sometimes occurred.
Workbooks and data sources published to Tableau Server 2018.3.3 from older versions of Tableau Desktop using newly added saved Salesforce credentials failed to refresh for the first 90 minutes.
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