An Unexpected Error Has Occured In “QuickBooks”: Returning Null Qbwininstance Handle

One of such error is that the Event id 4 error that arises when the user launch (QBi) QuickBooks Integration Manager. The error message“Integration Manager couldn't hook up with QuickBooks. Please confirm that it'sopen” is showed the user. Another error message that the a user notice is“QuickBooks Event ID 4 – An unexpected error has occurred in “QuickBooks”:Returning NULL QBW inInstance Handle” under Windows Event Viewer.For more info contact now- 1-855-481-5338.Visit-   https://accountingerrors.com/unexpected-error-occured-quickbooks-returning-null-qbwininstance-handle/