Question: During backup process, error message prompted: ‘File is not valid Archie. I/O error occur ?
Version: 1.8 / 1.9 / 2.0

Possible Reason:
Most probably you have installed WinRAR version 5.50 or higher at your pc. WinRAR version 5.5 has compatibility issue with Auto Count program that causes this error during backup.
Solution:
Resolution #1 Use Winrar 5.40
Simple and easy resolution, but NOT RECOMMENDED
(Critical WinRAR Flaw Found Actively Being Exploited in Winrar 5.6 and earlier version)
Uninstall your current WINRAR and go to WinRAR official website and download WINRAR 5.40. After that you can try backup and should not hit into that error anymore.
Download link for WINRAR: WinRar 5.4
Resolution #2 Don’t use Winrar
only applicable if database size is small
Go into Backup option and uncheck the checkbox “use WINRAR”. Without applying this option, the system will not backup your database using the WINRAR compression and thus you would not hit into this error.

Resolution #3 Update AutoCount Revision (Best)
This issue is solved in version 1.9.6.21 to support WinRAR version higher than 5.40. User may update version to 1.9.6.21 or above. Please contact your AutoCount Dealer to perform the revision update.