Hi Jeffrey:

Period 99 means that Ledger looked at the transaction date during the Retrieval process and found that it didn't correspond to any periods in the fiscal year(s).

In your example, you said "08/02/27". yy/mm/dd format?. Is that what you meant? If so, is that fiscal year open in your dataset?

Adding the Due Date won't help. But making certain that the dates are in the same format in both the Import template and in the Excel file is critical. It's also useful to use 4 digit years in both place for clarity.