Yeah, this error is annoying. You're trying to subscribe to a COM+ component, maybe after deploying an update or moving a component between servers, and you get the 0X8011044D error. The message says "cannot subscribe to this component (the component might have been imported)" — and that's exactly the cause. The component's registration in the COM+ catalog is broken because it was imported instead of properly installed.
Step 1: Remove the component from COM+
Open Component Services (run dcomcnfg). Navigate to Component Services > Computers > My Computer > COM+ Applications. Find the application containing your broken component. Right-click it and choose Export? No, don't do that. Instead, right-click the application and select Shut down. Then right-click again and choose Delete. This removes the application from the COM+ catalog.
Step 2: Re-register the COM DLLs manually
Open a command prompt as Administrator. Navigate to the folder containing your COM component's DLLs (usually something like C:\Program Files\YourApp\). Then run:
regsvr32 /u YourComponent.dll
regsvr32 YourComponent.dllThe /u flag unregisters the DLL first. If you skip this, the old broken registration stays in the registry. The reason step 3 works is because regsvr32 writes fresh CLSID and interface entries to the registry, which the COM+ catalog reads when you reinstall.
Step 3: Re-create the COM+ application
From the context menu in Component Services, right-click COM+ Applications and choose New > Application. Select Create an empty application. Give it the same name as before. Then under the new application, right-click Components and choose New > Component. Select Install new component(s) and browse to your DLL. Click through and finish.
Now try subscribing again. It should work — no more 0X8011044D.
Why this error happens
The COM+ catalog stores subscription data per component. When you import a component (like from an export file or another server), the catalog keeps the old component identity — but the underlying DLL registration points to a different file or path. COM+ can't match the subscription to the actual component registration, so it throws this error. What's actually happening here is that the COM+ catalog holds a stub with no valid class factory to call. Deleting the application and re-registering the DLL forces the catalog to rebuild the component entry from scratch.
Less common variations
Component from a different build
Maybe you're running a newer build of the component on a server that still has the old registry entries. The fix is still the same — unregister, re-register, re-create the COM+ app. But check the DLL version first with dllview or PowerShell:
(Get-Item YourComponent.dll).VersionInfo.FileVersionIf the version is wrong, you're deploying mismatched binaries.
Permissions issue
Sometimes you get this error when the COM+ identity account doesn't have read access to the component's DLL. Check the Identity tab of the COM+ application properties. If it's set to a specific user, make sure that user can read the DLL file. Switch to Interactive User for testing — it's a quick way to rule this out.
OCX or ActiveX control
If you're dealing with an OCX control (like a legacy custom control for a web app), the error can appear when the control was imported from a 32-bit to 64-bit system. You can't mix bitness in the same COM+ application. Register the 32-bit DLL in the 32-bit COM+ catalog (%windir%\SysWOW64\regsvr32.exe) and keep your application marked as 32-bit only.
Prevention
Never import a COM+ application from an export file if you have the original DLLs. Always delete the old application and recreate it from the fresh DLLs. If you're moving components between servers, use a proper installer (MSI or script) that calls regsvr32 and creates the COM+ app programmatically. That way every deployment starts with a clean catalog entry.
Also, version your COM components. A version bump in the DLL's file version tells you when the interface changed — then you know you need to reinstall the COM+ app. Without versioning, you're guessing which deployment broke the subscription.