INV810 only deletes the sequence number from the ILI of the item so it is not selected again for counting and does not delete the ICY record.
The ICY Cycle Count sequential history file increases in size with each new cycle count session. Running INV015 will purge all the old ICY records up to the date entered on the set-up screen ‘Enter Cycle Count Ending Date’ field. Physically deleting the old ICY files.
In most cases, when you complete the cycle count posting and run the reports, you can reconcile the data as required. After you reconcile the data for a specific day (or group of days), you can run INV015 to purge the data for that day (or group of days).