Company file will NOT open

Hi, Thomas.

I appreciate you for sharing the detailed description of the issue you’ve been encountering with your QuickBooks Desktop company file. I understand how frustrating and disruptive this must be, especially after years of smooth performance in your setup. Let me provide more information about this.

Given the complexity of the situation and the multi-environment setup you're using, this may require deeper technical checks of your company file and system configuration. Since the Community is a public forum with limited access, I recommend contacting your IT personnel or parallel virtual machine for assistance, they have specialized tools and expertise to go beyond what File Doctor and Tool Hub can do and can also identify issues affecting file access, such as compatibility or corruption, and provide tailored solutions.

While I know this has been difficult for you, but reaching their Support team will ensure you get a thorough assistance needed to resolve this as quickly as possible. They can help repair and optimize your file, as well as assess your setup for improved functionality moving forward.

We appreciate your patience and cooperation. Our support team is dedicated to resolving this promptly. Please leave us a response if you have other questions or concerns.

@ThomaStudios 

What MacOS do you run? Tahoe?

Sequoia on the M4, Sonoma on the other two.

What error message did you encounter? Error -6123,0 or else?

I got a -6123.0 message maybe once.  Other than that, nothing.  Just a gray screen and spinning blue circle, as I posted in my original message.  The info for the error message was no help whatsoever; a complete waste of time for me.

NONE of this exists in QB2024.  When you say QBO, it sounds like you mean QuickBooks Online.  I am NOT subscribed to that, so nothing you suggested is relevant to my situation.

I have noticed a case in the community a few days ago. The Parallels technician indicated that it is a known issue that Parallels is working on. The technician had the poster downgrade from Parallels 26 to Parallels 20.4.1. The technician said that 20.4.1 is more stable than 26, and they are working up patches and updates to 26. Because it is a known issue, Parallels is allowing any 26 product key to be used to down grade to 20.4.1 for the time being. Since the downgrade to 20.4.1, all their issues with Quickbooks 2024 Pro Plus have subsided and they operating normally.

Another option, you can consider use the trial version of QB Desktop 2024 Mac for the time being.

That is going back 6 major versions.  Are you sure about it being 20.4.1?  I looked on Parallels support pages and found nothing related to this.  Can you provide a link for the downgrade?  It might be worth a try.

Have you checked their forum?

https://forum.parallels.com/

Well, that was educational for sure!  Thank you for the link!

I can now access my company file and confirm that the steps below worked.  Thank you, SIAB, for pointing things in the right direction.

I believe this solution came from a tech @ Parallels:

This issue appears to occur after recent Windows updates when running QuickBooks 2024 on Parallels Desktop 26.1.2.
Please try the steps below to remedy the situation:
- Right-click the QuickBooks icon and select Properties.
- Navigate to the Compatibility tab.
- Click Change emulation settings.
- Under Execution mode, select Very strict execution.
- Restart your virtual machine to apply the changes.
This compatibility mode ensures QuickBooks runs with tighter execution constraints inside the virtual environment, which can prevent UI freezes, gray screens, and unresponsive behavior.

J D Thomas
ThomaStudios

Thank you for sharing...  I have been fighting for days trying to get my QB to work.  Called QB this morning and was basically told they know about the problem but don't know when they will have an update to fix it.  UGH....  Had a Parallels Tech on my Mac Studio and he couldn't figure it out either.  Then I found your post so I tried it and it worked!!!