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Microsoft documents that Windows Vista and later only support running native VSS writers. For example, on a 64-bit system running Windows Vista or later, only a 64-bit VSS writer is supported.
When the 32-bit c-treeACE Server ran on a 64-bit Windows Vista or newer system (such as 64-bit Windows Server 2008 or Windows 7), the server successfully loaded and initialized the VSS writer DLL. However, the command vssadmin list writers did not show an entry for c‑treeACEVSSWriter and Windows backup did not invoke the VSS writer.
The 32-bit c-treeACE Server now checks before it loads the VSS writer DLL for a 64-bit system running Windows Vista or later. If this is the case, the server logs error 995 to CTSTATUS.FCS and fails its startup:
VSS Init: Failed to initialize the 32-bit VSS writer. This version of Windows only supports native 64-bit VSS writers.
Could not initialize server. Error: 995
Error 995 is a new error indicating that VSS writer initialization failed.
