Verification requires single-user, exclusive access to the company file, and should be performed on the disk of the local machine (rather than over the network). This process will scan your data file for corruption.

To verify your company file:

1. Open your company.
2. From the File menu at the top of the screen, choose Verify Company File. A message box will describe the data verification process. Click OK in the box to begin the process of checking your company file for errors.
   

   Note: Data verification will take some time, depending on the size of your file.

    
   • When the data verification process is complete, a message will appear, describing the results of the test. If the process was successful, congratulations. Click the OK button to end the data verification process
   • If the process discovered errors in your company file, you should optimize the damaged file using the Optimizer (File > Optimize Company File). The Optimization Assistant is designed to make your company file more efficient, and is capable of fixing certain types of data errors that can occur in company files

Once you've optimized the file, perform the data verification procedure again to determine if the data errors have been repaired. If errors continue to be discovered, you should consider restoring the most recent backup of your company file and using that company file instead. You should check that company file for errors, as well.