0x801F0001: A handler was not defined by the filter for this operation.[1]
0x801F0002: A context is already defined for this object.[1]
0x801F0003: Asynchronous requests are not valid for this operation.[1]
0x801F0004: Disallow the Fast IO path for this operation.[1]
0x801F0005: An invalid name request was made. The name requested cannot be retrieved at this time.[1]
0x801F0006: Posting this operation to a worker thread for further processing is not safe
at this time because it could lead to a system deadlock.[1]
0x801F0007: The Filter Manager was not initialized when a filter tried to register. Make
sure that the Filter Manager is getting loaded as a driver.[1]
0x801F0008: The filter is not ready for attachment to volumes because it has not finished
initializing (FltStartFiltering has not been called).[1]
0x801F0009: The filter must cleanup any operation specific context at this time because
it is being removed from the system before the operation is completed by
the lower drivers.[1]
0x801F000A: The Filter Manager had an internal error from which it cannot recover,
therefore the operation has been failed. This is usually the result
of a filter returning an invalid value from a pre-operation callback.[1]
0x801F000B: The object specified for this action is in the process of being
deleted, therefore the action requested cannot be completed at
this time.[1]
0x801F000C: Non-paged pool must be used for this type of context.[1]
0x801F000D: A duplicate handler definition has been provided for an operation.[1]
0x801F000E: The callback data queue has been disabled.[1]
0x801F000F: Do not attach the filter to the volume at this time.[1]
0x801F0010: Do not detach the filter from the volume at this time.[1]
0x801F0011: An instance already exists at this altitude on the volume specified.[1]
0x801F0012: An instance already exists with this name on the volume specified.[1]
0x801F0013: The system could not find the filter specified.[1]
0x801F0014: The system could not find the volume specified.[1]
0x801F0015: The system could not find the instance specified.[1]
0x801F0016: No registered context allocation definition was found for the given request.[1]
0x801F0017: An invalid parameter was specified during context registration.[1]
0x801F0018: The name requested was not found in Filter Manager's name cache and could not be retrieved from the file system.[1]
0x801F0019: The requested device object does not exist for the given volume.[1]
0x801F001A: The specified volume is already mounted.[1]
0x801F0020: No waiter is present for the filter's reply to this message.[1]