Just like computer files, databases will be corrupted in their life time due to user errors, power failure, hard drive errors, and so on.
Click Here (http://www.warriorsystem.com/public_download/Warrior_8_Support/Warrior%208%20Corrupted%20Database%20Repair%20Guide.pdf) to see the Warrior 8 Corrupted Database Guide in PDF format. (You can also Right-Click and Save As... to your computer for future viewing)