Diagnosis
You have entered a date for the reorganization of the log for invoiceprint.
This means that all log entries up until this date will be deleted.
Afterwards you can no longer establish which invoice numbers belongedto which customers and rental agreements in which due months. Howeverthis information makes it easier to carry out the repeat print whenrequired.

Procedure
Only carry out the reorganization up to the date where you are surethat you no longer need the log entries.
If you do not want to carry out the reorganization, delete your dateentry before you execute the program.