How to Fix QuickBooks error code c=51?


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QuickBooks error code c=51 is a troublesome error that abruptly stops your work, causing havoc in the workplace and stopping you from meeting deadlines. If nothing, it hampers client relations when deadlines aren’t met. The accounting software we all adore sometimes catches these glitches that users very frequently complain about.

If you’re among those who encountered QuickBooks error code c=51, it is highly recommended to stick to the article. 

What is QuickBooks Error Code C=51?

QuickBooks error code c51

Just like any other item list in QuickBooks, you must have heard about the tx list too. However, from a whole list of TxLists, you may want to discard some or any. But suddenly an error occurred in QuickBooks c=51: “QuickBooks error code c=51: QuickBooks is not able to find the TxList file.”

While most of you might wonder what is c 51 error in QuickBooks is and why are you facing it.

This most probably occurs when QuickBooks is not able to find txlists. Another point during routine tasks when c = 51 QuickBooks error flashes is when you try to delete transactions from a report but are unable to do the same. Most users find this QuickBooks error code C=51 alarming because the name is confusing. However startled you might be when QuickBooks error C=51 pops, it is mostly harmless. Hence it can be resolved by following quick-fix methods precisely.

What Causes QuickBooks Error Code C=51?

The best way to resolve any issues, let alone, an error occured in QuickBooks c=51 is to resolve it from its very source. But in order to do that, you need to know how c = 51 QuickBooks error arises. Let’s review the causes of QuickBooks error c=51.

  • Damaged components of your system.
  • You have not verified QuickBooks properly.
  • A damaged or corrupted QuickBooks database server can sometimes cause QuickBooks error code c=51.
  • TxLists transactions are deleted by mistake, without properly checking.
  • QBW file and log files are in the same location, in the same folder.
  • Your system might be infected with a virus or malware that leads to c = 51 QuickBooks error.
  • An error occured in QuickBooks c=51 due to weak connectivity to the internet.
  • The company file has not been backed up recently.

Instant Fixation Methods of QuickBooks Error Code C=51

We know what is c 51 error in QuickBooks and why it might be arising. Now, it’s finally time to hop on to resolve the issue. So let’s start without delaying any further.

Method 1: Restart QuickBooks 

Reboot QuickBooks to resolve minor bugs and glitches like QuickBooks error c=51.

  • Close all the active programs on your system, including QuickBooks.
  • Now start your QuickBooks again.
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Method 2: Shut QuickBooks From Task Manager

Even after we close a software, it keeps running in the background and thus catches bugs and glitches. These glitches are c = 51 QuickBooks error and therefore you will have to end the process of the software from the task manager. Here’s how:Shut QuickBooks From Task Manager

  • Close the QuickBooks application.
  • Also, close all the files related to QuickBooks.
  • Now, click right on the taskbar and open the task manager.
  • Under the processes tab, hit the option image name.
  • Now one by one select QuickBooks and related files and hit the end process.
  • Exit the taskbar after all QuickBooks processes are ended.

Method 3: Run File Doctor

QuickBooks file doctor is a tool that diagnoses and fixes damages in the company file data including QuickBooks error code c=51.

  • Download QuickBooks Tool Hub from Intuit’s website.
  • Install it through the instructions on the screen.
  • Open the application and go to company file issues.Run File Doctor
  • Tap on Run QuickBooks File Doctor.
  • Select the company file you want to fix by tapping on browse.
  • Click on check your file and network > next.
  • The tool will then start scanning and fixing damages.

Method 4: Restore Data From Backup Files

A backup is a copy of your data that is stored in your system for use in situations like when primary data is damaged. So you can restore data from these backups and therefore your data is saved and protected.

  • Locate the folder where backup files are stored.
  • Click right on the file and tap on properties
  • Check the size of the file to be below 6 MB. If not, the backup file is incorrect.
  • Restore the backup file and copy them to a new folder, if it is lower than 6 MB.
  • Otherwise, create new backups.

Method 5: Update the Latest QuickBooks Version

While operating an outdated QuickBooks software, you will not only face difficulties but also an error occured in QuickBooks c=51. All you have to do is update the latest release of QuickBooks to resolve this particular issue.

  • Open the QuickBooks application.
  • Click on the Help menu.
  • From the drop-down, choose update QuickBooks.
  • Hit the update now button.Update the Latest QuickBooks Version
  • As soon as you press get updates, new updates will start downloading.
  • Once completed, restart the system to install these updates.

Method 6: Check Your Network Connection

When or if your internet connectivity is weak, you will face a lot more errors than just QuickBooks error code c=51. Check your internet connection by:

  • Tap on the start menu.
  • In the search field, type settings.
  • Hit enter and open the settings menu.
  • Go to the network and internet tab.
  • On the very top, you’ll be able to find the internet connection status.
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Method 7: Restore The Missing (Deleted) Entries

When some transactions went missing in a report, you’ll come across QuickBooks error code c=51. Apparently, this can be reverted by restoring those deleted transactions. But how? We got you! Let’s have a look at the steps:

  • In QuickBooks, click the gear icon to open settings.
  • Select the right user, date, or event of the transaction under the audit log.
  • Tap on Apply.
  • Now, locate deleted transactions. You can type CTRL + F and type delete and locate the same.
  • Select history > view > event.
  • Collect all the data you need from here.
  • Next, you’ll have to re-enter the transaction. Here’s how:
  • Tap on new.
  • Select option invoice/transaction.
  • Select the customer from the customer tab.
  • Add the date and hit product/services.
  • Next, add all the necessary details.
  • Opt for save and close or save and send.

Method 8: Run Rebuild Data Utility Tool

The Rebuild data utility tool fixes and rectifies any damages in the data only with just a few clicks.Run Rebuild Data Utility Tool

  • Launch QuickBooks and open the file menu.
  • Tap on the utility option.
  • Select the rebuild data tab.
  • It will prompt and ask you to create a backup of the company file. Press ok.
  • Choose the location where you want to save the backup file. Hit ok.
  • As soon as a backup is created, the tool will start its work.
  • Once completed, hit ok.


QuickBooks error code c=51 can slow down your system or even crash your programs, miserably affecting your work. The best way to tackle c = 51 QuickBooks error is to resolve it. Finally, with this, we come to the end of this article. With deep research and a lot of hits and trails, we bring to you a handful of these well-working solutions. These are lists of foolproof solutions that actually did what we expect. We hope you were able to resolve this troublemaker QuickBooks error code c=51 in your system. 

Frequently Asked Questions:

Q1: How do I fix error 80070057?

  • Launch the company file in the right manner.
  • Update QuickBooks to the latest release.
  • Run QuickBooks with administration credentials or permission.
  • Change the location of the company file to default.
  • Run QuickBooks file doctor.
  • Run QuickBooks database server manager.
  • Rename .nd file.

Q2: How do I run a doctor file in QuickBooks?

  • Download and install the QuickBooks tool hub.
  • Open it and move to company file issues.
  • Click on run QuickBooks file doctor.
  • Tap on browse and select the company file you want to fix.
  • Choose the option to check your file.
  • Continue > add password > next.
  • Now the scanning and repairing will begin.

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