The Rebuild Data Utility repairs transaction and list damage in your company file, but it is limited to damage it is programmed to fix.
Note: Frequent Rebuilds may be caused by Negative Quantity on Hand also known as Negative Inventory.
1. DO MAKE A BACK UP OR A COPY OF YOUR DATA FILE BEFORE REBUILDING.
2. DO NOT RUN THE REBUILD OVER YOUR NETWORK.
3. DO NOT CANCEL OR ABORT THE REBUILD DATA UTILITY.
Important: QuickBooks Auto Data Recovery is available only in QuickBooks 2010 R12 ,QuickBooks 2011 R6 and QuickBooks 2012. QuickBooks Pro and Premier only. If you restore a backup or Auto Recovery file, you may need to re-enter some transactions.
If you cannot backup your company data file, you can run the Rebuild Data Utility and bypass the backup part of the process.
WARNING: Before using this option, you must create at least one copy of the folder that contains your company file on another computer or external storage device. If you cannot make a copy of the file, please contact your system or network administrator, a computer consultant, or QuickBooks Technical Support.
Rebuild can fail if it encounters a transaction that is so badly damaged that it 1) cannot ignore it, 2) cannot repair it and 3) cannot delete it. If Rebuild crashes, the last line of the Qbwin.log file / Rebuild log shows the transaction that caused the crash. If you can identify the damaged transaction, then you can:
If you cannot identify the transaction from the Rebuild log, then the data file is a candidate for Data Services.
If these steps do not resolve the issue, you can read discussions and post messages and questions relating to your issue on the Intuit QuickBooks Community site for free or you can contact a technical support agent for additional guidance. Fees may apply.