Are you using the latest version of Omniscope 2.9?
Are you using a DataManager Data file output publishing block to export to Excel, using the Excel direct writer and are you expecting to Replace workbook, Replace worksheet, Replace data or Overwrite data?
Can you post a screenshot of the DM Data file output publishing block with your settings?
I am using the Excel direct writer and expecting to replace worksheet. When I try to publish the file omniscope seems to open an temporary excel file that doesn’t appear to me (when I tried to delete these temporary files it said that I already had them open).
It turns out that when you choose a pivot table to automatically refresh from data, this makes the omniscope raw data output not work. Once I turned off this option everything was fine.