Hi, BigBillFL.

If you have inventories, QuickBooks files with negative inventory or negative quantity on hand are one of the reasons that QuickBooks will not condense. You will first need to repair negative inventory in your data file before condensing the file. 

Here's how:

1. From the QuickBooks Reports menu, choose Inventory, then select Inventory Valuation Summary.
2. QuickZoom an item that is showing incorrect values by double-clicking the item name. This opens the Inventory Valuation Detail report for the item. The transactions associated with this item are listed in order by date.
3. QuickZoom the first Bill listed to open the Enter Bills window.
4. Change the date on the bill to a date earlier than the first invoice listed on the detail report you opened in Step 2.
5. Click Save & Close to record the bill with the new date.
6. Repeat Steps 2 through 5 for each incorrect item.

To get more details on how to fix negative inventory, check out this article: Negative inventory causes issues in your company data file.

If you're still getting the same result, I'd suggest contacting our QuickBooks Desktop Support. Agents have the necessary tools to look into your account and locate where the problem is stemming from.

Here's how you can contact us:

1. Within your QuickBooks Desktop, click Help at the top menu bar.
2. Enter a brief description of your concern then click Contact Us.
3. To route you to the correct support expert, we need to know what type of question you have. Give a brief description of your issue and click Continue.
4. We’ll provide you a few options. You choose which one is best for you.

Here are additional references that might be helpful for future use of condensing and rebuilding your data:

• Target Chaining or Unrecoverable Error when running Rebuild utility.
• Use the Condense Data utility.

You can always leave a reply below if you have any other QuickBooks questions.