Quickbooks File Repair — "Quickbooks Error C=79 (problem with inventory data)"
QuickBooks error C=79 points to a problem with inventory data -- the program hits inventory records it cannot read or reconcile correctly. Our team recovers from this error and returns a clean file without data loss.
What C=79 means
The C= value names the internal routine that raised the fault. C=79 is associated with damage or inconsistency in the inventory portion of the company file -- the item list, quantities on hand, and the transactions that move them. When those records fall out of agreement, QuickBooks flags the error.
Common causes
- Damage to the company file affecting the inventory records.
- Security software interfering with QuickBooks' access to the file.
- Hosting conflicts when more than one machine hosts the same file.
- Non-US versions of Windows or regional settings that don't match the file's expectations.
- Missing or moved QuickBooks supporting files.
What you can safely try first
- Temporarily allow QuickBooks through your security software and retry.
- Confirm only one computer hosts the file, and check your regional settings match a US format if the file was created that way.
- Run Verify Data and then Rebuild Data (File > Utilities) to repair what QuickBooks can.
- Make a backup before any further testing.
When professional recovery is the safer path
Inventory damage often resists Rebuild, and forcing repeated Rebuilds can scramble quantities further. If C=79 persists after you've cleared the configuration causes, the inventory records inside the file need direct repair. Our engineers read the file structure, recover and reconcile the inventory data, and rebuild the file so it opens without the error -- with your items and history intact.
Why bring it to us
We have the expertise to recover from this error, working in-house in North America and never outsourcing your file. There is no charge if we cannot recover your data.
Read more about QuickBooks data recovery, or start a recovery.