In the data load rule options you should be able to set purge data file to No, if the load method is "Numeric Data only - File" or "All Data Types" then you can check the dat file in the outbox, the file is loaded to planning/essbase so you can see the member combinations where the data is being loaded to.
Do you have any sort of category mapping going on or any other explicit mapping which would affect where the data would be loaded to? Is FDMEE executing any calculations after data load that could be moving the data?
I found dat files (ApplicationName_ProcessID) for two processes but they are empty...
Category mapping is ok. Yes, there were two aggregation rules at the end of data load but I also tried after disabling them as well.
So the export file is blank which would mean nothing is being loaded to planning, is this a multi currency application?
You also said you are loading from an Oracle view, does this mean you are using the Universal Data Adapter?
If yes to any of these you should check out the following support docs
FDMEE Blank Data File For Loading to Planning When Records Are Valid For Export (Doc ID 1621973.1)
FDMEE UDA Data Export Successful But No Data Loaded Into Planning- Data File Is Blank (Doc ID 2281940.1)
FDMEE Data Load Not Working For Multi Currency Planning Application (Doc ID 2288165.1)