Effective Way out To Troubleshoot QuickBooks Error 12002

QuickBooks Error Code 12002 is a technical error that appears abruptly and puts a complete dead stop on the accounting operations performed in QuickBooks. This error is typically caused due to a slow internet connection or a network timeout.  There are different strategies that can be adopted to fix QuickBooks Error 12002. 

Major Causes Behind QuickBooks Error 12002

• The firewall or security software may be causing the error.

• Erroneous SSL settings.

• Insufficient storage in the system.

• Internet Explorer not set as the default browser.

• Poor internet connectivity.

• Wrongly set internet settings can also provoke Error 12002 in QuickBooks. 

Procedure to Fix QuickBooks Error 12002

Solution 1: Make Sure Internet Explorer is the Default Browser

• Press the Windows and R keys to reveal the Run box.

• Type INETCPL.CPL and tap on Ok.

• Head to Programs. 

• Herein, make Internet Explorer as the default browser.

• Run QuickBooks and perform the action that previously led to QuickBooks error 12002. This solution should fix the error, if it doesn’t, move on to the next solution.

Solution 2: Configuring Internet Settings

• Open the Run window.

• Type INETCPL.CPL in it.

• Hit the Enter key.

• Set the protection level to Medium-high.

• Click on the Internet option.

• Now, go to the Security tab.

• In the Security tab, head to Connections.

• Hit on LAN settings.

• In the Connections box, checkmark the box corresponding to automatically detect settings. 

• Unmark "Use a proxy server from your LAN".

• If it is marked, then type in the correct I.P. and Port.

• After that, hit on Ok.

• Now, go to the Advanced tab, followed by the security section.

• Click on Use TLS 1.2. 

• Hit on the Ok button.

• Check if QuickBooks error 12002 got resolved.

Solution 3: Update QuickBooks 

• Quit all the active windows of QuickBooks. 

• Open QuickBooks and keep holding the Ctrl key until the No Company Open window shows up.

• When QuickBooks opens, go to the Help menu.

• Click on Update QuickBooks Desktop.

• Hit on Update Now.

• Click on Get Updates and then choose the Reset Updates option.

• Click on Ok and wait for the updates to finish downloading.

• After that, hit on Close.

• Now, install the downloaded updates by re-opening QuickBooks.

• Hit on "Yes" on the onscreen prompt.

Solution 4: Make an Exception for QuickBooks in the Firewall

• Hit on the Start menu.

• Search for “firewall” and open the Windows Firewall.

• Go to "Advanced Settings" and right-click "Inbound Rules".

• Tap on the New Rule tab.

• Click on the Port and choose the TCP.

• Hit on Next.

• Opt for the right port for your version of QuickBooks.

• The port numbers for QuickBooks 2019 are 8019, 56728, 55378-55382, 56276, 55368-55372, and 55378-55382.

• Upon entering the port, click on Allow Connection.

• Then, hit on Next.

• Pick each profile in the pop-up box.

• Now, give the new rule a name and then click on Next.

• Hit on Finish.

• Perform the same set of instructions for the Outbound rules.

• This should fix QuickBooks Error 12002.

Solution 5: Clean Install QuickBooks Desktop

• Open the Control Panel.

• Go to Programs and Features.

• Opt for QuickBooks and follow up by hitting on Uninstall.

• When the program is removed from the system, visit the QuickBooks directory and rename the QuickBooks folder.

• Later, reinstall QuickBooks and use the license and product keys for activating and registering the product.

• Check if QuickBooks Error 12002 got obliterated.