| Previous | Next |
| MILAVERR_NOREADYFRAMES | MILAVERR_WMPFACTORYNOTREGISTERED |
MILAVERR_MODULENOTLOADED
The scope of MILAVERR_MODULENOTLOADED is WPF media module activation and version compatibility. A media module required by the WPF integration path is not loaded or could not be made available. Keep 0x88980505 beside the returning method because a wrapper can replace this distinction with a generic subsystem message.
Subsystem context
The WPF media integration path historically depends on registered modules and COM factories. Discovery, activation, bitness, interface negotiation, and runtime version are separate boundaries. A file existing on disk is not evidence that the expected class is registered in the caller’s registry view or that the activated object implements the versioned contract MIL expects.
Module discovery, loader compatibility, or initialization before the media object is usable.
Do not hide the original condition
MILAVERR_WMPFACTORYNOTREGISTERED is specifically about the WMP factory registration; MODULENOTLOADED is broader. Do not treat the constant name as a complete root-cause report; preserve the nested media, COM, graphics, or driver result before resetting the player.
Evidence to preserve
- Module name and path when available
- Process architecture, OS build, and WPF runtime version
- Loader events, dependencies, and code-signing result
- First COM or LoadLibrary-related HRESULT
Isolation procedure
Record CLSID, module path, registry view, process architecture, activation HRESULT, and queried interface version. Compare a clean supported system image rather than copying DLLs or registry entries between machines.
- Reproduce in a process with matching architecture.
- Check the module and its dependencies through loader diagnostics.
- Compare with an inbox media path on the same system.
- Repair the owning Windows feature or application deployment rather than copying one DLL.
Technical references
Looking for a different code? Search another status or error code.