Visula D fails to build after Windows updates

[Mike James]

Hi,

After a recent Windows update cycle the Visual D projects now fail to 
build - it can't find the D source files - the output from compiler is 
below.

===================================================================================

OPTLINK (R) for Win32  Release 8.00.12
Copyright (C) Digital Mars 1989-2010  All rights reserved.
http://www.digitalmars.com/ctg/optlink.html
OPTLINK : Error 118: Filename Expected
Path=C:\D\dmd2\windows\bin;C:\Program Files\Microsoft 
SDKs\Windows\v7.0\bin;C:\Program 
Files\GTK+-Runtime-3.4.2\bin;C:\D\dmd2\windows\bin;C:\D\dm\bin;c:\MinGW\;C:\Program 
Files\CVSNT\;C:\lazarus\fpc\2.4.0\bin\i386-Win32;c:\dmd2\windows\bin;c:\dm\bin;c:\opt\gtk\bin;c:\bud\bin;c:\program 
files\mercurial;c:\program files\cmake\bin;c:\d\dmd2\dsss\bin;C:\D\dmd2\gtkD

^
--- errorlevel 1
Building Debug\dgen.exe failed!

====================================================================================

This has occured on 2 PCs, one Vista and one Win7 straight after recent 
updates. Has this occured to anybody else and whats the fix for it?

Thanks.

Regards, Mike.