Error: "Sage 50 cannot be started" when Actian isn’t running

The above error occurs in Sage 50 Accounting when Actian isn't running or needs restarting.

Reboot the computer. This is a quick way to fix the issue in a stand-alone installation.

If using Sage on a network, perform these steps first at the server. Close Sage 50 on all computers before proceeding.

Press the WINDOWS+R keys to open a Run line.
Type services.msc.
Select OK.
Right-click Actian Zen Workgroup Engine and select Restart (If Restart isn’t an option, select Start).
Double-click Actian Zen Workgroup Engine.
Make sure the Startup type is Automatic.
Select the Recovery tab.
Select Restart the Service in the First failure and Second failure dropdown boxes.
Then set Reset Fail Count to reset after one day.
Click OK.
Verify Sage opens on the server and the workstation without error.

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