I am trying to import a csv file and get the same error. I have tried to set the system date as detailed and I still get the "Invalid Date '05/31/2006' in field called 'Fiscal Date" in record 1" I do not get an error on the trasnaction date however. It is set to ascii YYYYMMDD format.
I had no issue with this previously but recently I installed a Ledger patch.
Sheldon Dyck