Certain fields in the TradeLog grid must contain integer values. When a user attempts to import invalid data from a broker trade history report into one of these fields, TradeLog cannot recognize the format and generates an error message.
Review your broker trade history report carefully to identify any special characters or erroneous data. Edit any errant imported transactions as necessary and see if the error is resolved.
If the cause of the error is not apparent, please submit an Online Support Request and attach the data file you are working on.