• If the Company file is located on the external media rather than local or a network drive.
• QuickBooks is trying to open the Company file.
• When you are running QuickBooks in the multi-user mode, the Bit Defender security software is blocking the communication.
• Incorrect Folder permissions are given in which the company file is located.

That’s all for QuickBooks Error 77. If you are facing any difficulty, then you can seek technical help by contacting us at QuickBooks Customer Service +1-877-603-0806.

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