Close down program and restart the computer.
Step 2.
Open up Cashbook and if the error occurs again at the same spot please make a backup of your data, (i.e. File/Backup Data Files menu option)
Step 3.
Either: (a) Upload your backup to the Practical Systems Data Warehouse, then send an email to support@practicalsystems.com.au with an explanation of what you were doing when the error occurred and your data warehouse password. NOTE that the data warehouse password is case sensitive Or: (b) Attach the backup you have just created to an email and send it to Practical Systems with an explanation of what you were doing when the error occurred.