QuickBooks Already Has a Company File Open is an error that arises when the user fails to access the company file while using the QB Desktop in multi-user mode. This error pops up due to incorrect hosting settings. You can resolve this error by correctly configuring hosting settings and restarting the QB Database Service. You can obtain the most reliable solutions in this blog or you can dial 1.855.738.2784 to get assistance from a QB Expert
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