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Error C=79 when running the Verify Data utility or the Rebuild Data utility

When running the Verify Data utility or the Rebuild Data utility, QuickBooks Desktop pops the error:

Error: C=79

A damaged inventory item can cause this error.

How to fix it

1. Review the Inventory Valuation Summary for each "V=" number in each occurrence of the error:

  1. Select the Reports menu and select Inventory > Inventory Valuation Summary.
  2. The "C=79" error message appears once for each inventory item that has a history problem. Write down the "V=" number in each error message.
  3. If the "V=" number does not appear in the error message, close each message and write down each "V=" number in the Qbwin.log file.
  4. To create the reference number for the "V=" number, write down the number of occurrences from either the Inventory Valuation Summary report or the Qbwin.log file and divide this number by 256.

2. Before proceeding, preserved your data by backing up and/or copying your company data file. Do not overwrite any previous backups or copies. In the Menu Bar, select File. Then select the appropriate menu entry and follow the wizard that opens.

3. Identify the damaged list item by export the Item list to Microsoft Excel:

  1. Export you Item List to your desktop. 
  2. Open the Item List in Microsoft Excel or similar application.
  3. In the REFNUM column of the spreadsheet, divide each occurrence of the "V=" number by 256 to obtain the reference number. The item on this line is the damaged List Item.

4. Locate and repair the damaged Item list:

  1. Select the Lists menu, and select Item List.
  2. Select the Item button and select New.
  3. Select Inventory Part from the Type drop-down list and enter the name of the damaged List Item (obtained from the REFNUM) in the Item Name/Number field, adding an asterisk (*) at the end of the name.
  4. Click the Income Account drop-down arrow, select an income account, and then click OK.
  5. In the Item List, double-click the original (damaged) Item. Write down the information in all fields in the Edit Item window.
  6. Update the information in the Item Name/Number field to exactly match the information entered in step c, including the asterisk, capitalization, spacing, and punctuation. Click OK to save the changes and click Yes when asked to merge the items.

    Note: The "C=79" error may occur numerous times when merging. This is expected; you should be able to click OK and continue.

  7. Create a second new inventory item by clicking the Item button and select New. Enter the original item name, without the asterisk. Select an Income Account, and then click OK.
  8. Double-click the item that has the asterisk in the name, and edit the Item Name/Number field to exactly match the newest item you created by matching the capitalization, spacing, and punctuation (without the asterisk). Select OK, and then click Yes when asked if you want to merge the items.
  9. Double-click the resulting inventory item and, in the Edit Item window, enter the information you wrote down in step e. When finished, select OK.
  10. Select the Reports menu, then select Inventory, then select Inventory Valuation Summary. The report should run without popping the "C=79" errors.

5. Run the Verify Data utility to confirm that no more problems are detected:




KB ID# SLN40508
4/28/2017 2:45:39 PM
QYPPRDQBKSWS03 9138 Pro 2017 a9de59