QuickBooks Error Code -6144 can be seen while trying to open the company file. Root Causes of this error can be unspecified path to the company file or QuickBooks Database manager dysfunction.
How to fix QuickBooks Error Code 6144, 0 : Download and run QuickBooks File Doctor to repair the company file by troubleshooting it automatically on the other hand Re-install Quickbooks after Deleting the Windows user account used by QuickBooks Database manager. The Windows user account used by the QuickBooks Database Manager has a name that begins with qbdataserviceuser make sure that you delete the account that is associated with your version of Quickbooks.
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