How to Fix QuickBooks Error Code C=51?

QuickBooks is one of the popular accounting software which is being used by many companies for their accounting needs. Used all over the world, this software sometimes faces some technical errors which can be resolved by following some steps.

In case of complicated errors, the user may need to take assistance from a QuickBooks data recovery support team by contacting on their toll-free number .i.e. +1-866-707-7925. QuickBooks Error Code C=51 is one such error which gives a warning to the user that QuickBooks is not able to find TxList. In this article, you will learn about this error and what steps you can take to resolve this error.

Read Also: How to troubleshoot basic QuickBooks company file Issues?

What is QuickBooks Error Code C=51?

While using QuickBooks, you may face the Error Code C=51 which gives the following warning- “QuickBooks cannot find the TxList from the list of txLists”. This usually occurs when a user tries to remove txList from the list of other txLists and then is unable to find it. This can also occur when the user tries to remove a transaction from any of the reports.

Users usually get very tense when they are unable to get rid of this error but our technical support team can help you resolve this error code C=51. First of all, close all the reports and shut down QBW. When you face this error, just shut down the application, close all Windows including QuickBooks also. After this, restart the application and repeat the action in which Error C=51 was received. Verify in QB release 7 or later; or Rebuild data.

Read Also: What is QuickBooks connection diagnostic tool?

What is the requirements to fix the error?

  1. The transaction log file (.TLG- in the same folder as the corrupted QBW file)
  2. Also, corrupted QuickBooks data file (.QBW)
  3. An older backup of the QuickBooks data file (.QBW or .QBB or .QBM)

Causes and Solutions of QuickBooks Error Code C=51

Cause 1: Interruption in Connection

There is some problem in the network connectivity while the system undergoes downloading process. This may have prevented some transactions from getting downloaded. Thus, you are not able to check the transactions which results in error C=51.


Make sure that before you start the downloading process, you check the Internet Connection properly so that there is not such issue in between the process.

Cause 2: When you try to access the transactions that are deleted or lost

Please note that you will not be able to access the transactions that have been lost or deleted from the QuickBooks company file.


Try restoring the lost transaction. Restore all the accidentally deleted or altered transactions: You can find the accidentally deleted or altered transactions in QuickBooks Audit Trail Report. Re-enter the information to restore the transactions. The Audit Trail will show you all the transactions that were entered in the company file including those which were deleted earlier. Another benefit is that it also displays the historical changes that were made.

You can open the report using following steps:

Step 1: Go to Reports menu

Step 2: Select Accountant and Taxes, and click Audit Trail

  • If transactions were lost due to technical problem: In this case, you can restore the lost transactions and its data by using QuickBooks Backup (.QBB) file.
  • During all this process, ensure that the backup file is updated.

Cause 3: Damage caused to data

When you try to find the lost or damaged transaction from the QuickBooks Company file, then you can receive the QuickBooks error code C=51. This error usually occurs when the data in the transaction is damaged.

Read Also: Rectify QuickBooks Error code 6190, -816 using 6 Steps


Verify and Rebuild Data

When you run the ‘Verify Data’ utility, then you can also encounter the data issues that occurred in the QuickBooks Company file. And when you run ‘Rebuild Data’ then you are able to fix the data integrity issues which Verify Data utility finds.

Steps to run Verify Data utility:
  • Go to File > Utilities > Verify Data
Verify hosting data
  • If you receive this message- ‘“QuickBooks detected no problems with your data,” then no further action is required. If the message comes ‘Your data has lost integrity’, then there is some data damage in the company file. Once the data damage is found, then run ‘Rebuild data’ and fix the issue.

NOTE: If you are an Assisted Payroll customer, then you should contact an Assisted Payroll agent before you run Rebuild Data.

Here are the steps to Rebuild Data:

Step 1: Go to File > utilities > Rebuild Data

Verify and Rebuild Data in QuickBooks Desktop - Screenshot

Step 2: If you want to backup your company file, then click OK

Step 3: Find where you want to save the backup, and then click OK button.

Step 4: Click OK as soon as you receive message that ‘Rebuild has completed

Once all the above steps are completed, run ‘Verify Data’ again and check if any other data damage exists. If you still find a data damage, then use a Professional QuickBooks Repair Software.


We discussed all the possible causes and solutions to get rid of QuickBooks Error Code C=15. Internet connection, lost transactions and other reasons can be the cause which can be resolved very easily. In case of major issues, you can contact our QuickBooks enterprise support team at toll-free number +1-866-707-7925.


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