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I have been trying to refresh and schedule the refresh of a dataset in PowerBI Online. I have no issues refreshing using PBI Desktop. The data sources are files on SharePoint and email attachments in an Outlook Exchange account, no gateways. A search led me to this link: https://rohitvangala.wordpress.com/2017/02/02/error-the-exception-was-raised-by-idatareader-interfac... but all of the relationships in my model are text types. I made several changes to data types, filters, ways in which I extract sources, only to get the same result and the error I'm receiving is in no way clear to me.
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