Application cannot be started

Some QuickBooks Desktop users may be prompted with a message “Application cannot be started. Contact the application vendor.” See image below.

There are two possible solutions to this issue. It's recommended you try Solution 1 first. If it doesn't work for you, proceed to Solution 2.

Solution 1 - Rename Windows local/apps/2.0 folder[top]

  1. Completely shut down the Sync Engine.
  2. In Windows, navigate to the folder c:\users\username\appdata\local\apps\2.0
    In the folder address, username will appear as the name of the Windows user (as in our example below).
  3. Rename the 2.0 folder (choose a name that makes sense for you).
  4. Run the Method Sync Engine. This will recreate the folder you renamed above.

At this point, the sync engine should run properly.

Solution 2 - Disable / Re-enable antivirus[top]

If Solution 1 does not work for you, your antivirus program may be conflicting with the sync engine.

  1. Uninstall the Method Sync Engine.
  2. Disable your antivirus program.
  3. Reinstall the Method Sync Engine.
  4. Re-enable your antivirus program.

At this point, the sync engine should run properly.

If you are running AVG Antivirus, you will need to add an exception for the Method Sync Engine telling AVG to ignore this folder, or the conflict will reoccur. To learn how to add an exception click here.


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