Data Exchange - Data Export Planning Error

Summary:

Client wants a data export from a custom RevCOGS cube. They want account and period in the rows, and the DATAEXPORT business rule command requires a dense dimension to be in the columns so this method won't work. Trying to create the Data Export in Data Exchange keeps producing an error that all the data rows are [BLANK] yet the error log shows the rows do have data (which aligns to the data I can confirm is at the targeted intersection).

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EPM Cloud Planning