I have 3 computers networked together. One of the PCs is the “server”, and QB was installed in server mode on the server PC. QB works just fine on the server PC. The other two PC work ok, but often the get intermittent “Can’t communicate with the company file…” errors. If I run Scan Folders in the Database Server Manager, on the server, the other two networked PCs can open QB as normal again, but a day later the “Can’t communicate…” error pops up again. All three computers are Windows10 and Windows firewall is turned off on all three computers. QB version is Desktop Premier 2021.
I'd like to add a solution to help you fix the error.
If you haven't tried turning off the hosting on your workstations, let's do that to resolve the error. Before doing so, please update your QuickBooks Desktop to the latest release. Then, follow the steps below to turn off the Host Multi-User Access option ion your workstations. These are computers connected to your network that don’t host your company files. Your server computer should be the only one hosting.
Once done checking your two workstations, move on to your server computer and reset your hosting settings by following these steps:
For reference, you can check Step 6 in this article: How to fix "Error: Cannot communicate with the company file due to firewall".
I'm also including these links to learn more about the system requirements and see other solutions when you can't open the program:
Please let us know how things go after trying out the steps above. We're here to help you out again. Take care and stay safe.
Hi RenjolynC, I performed the steps you offered, but unfortunately the problem continues. We're still having to run Scan Folders in the Database Server Manager, once or twice a day, to allow the workstations to open the company file on the server.
Appreciate the update, @runmonkey.
Since the issue persists even after following the suggestions above, I recommend contacting our Customer Care Support. You can work with one of our specialists in letting our engineering team investigate why such an error pops up.
I want to include that reaching out to our Customer Care Support is best during business hours from 6 AM-6 PM PT Monday-Friday. Use this article to learn more: Contact QuickBooks Desktop Support.
You may also read this reference with the topics to use while working with your company data: How to Fix General Problems When Your Company File Won't Open?
I've got you covered if you have other questions about hosting your company. Let me know by leaving a comment using the Reply option below. Take care always!
Consider to install the trial version of a private cloud solution to isolate the issue. Your client computers will access QuickBooks file(s) over the internet, not thru the LAN network. If it works, the root cause is on your network. Otherwise, you will focus to troubleshoot your host machine, including change the host to another machine and compare the results.