First time since a Windows 10 update last week I tried to check a plan and PlanChecker.js just fell over without showing any Notepad output. When I ran it in cmd prompt, it showed:

C:\Program Files (x86)\ACP Obs Control\Planchecker.js(224, 1) Microsoft JScript runtime error: Automation server can't create object

I tried re-registering dc3reg.dll, but no help. Line 224 seems to be instantiation of ACP.Plan.

Need to check my plans as they run on a shared remote site with inflexible reservations.

Any ideas or similar tales welcome.