[CMake] CMake "permission denied" problem (Windows 7 64-bit, CMake 2.8.1)

[Phil Smith]

Followup to problem, a colleague asked:
>You mentioned that you had adjusted permissions on the file, but the permissions have be correct all along the path - you might want to check the parent directories to ensure their permissions are right.

I should have noted originally: I did check the whole path. And I did try a command prompt run as Administrator. All permissions good, no joy as admin.

>The compiler must have had permission to write the file – I’m guessing CMake copied it somewhere??

No idea what CMake did – that’s part of the problem! The dasm command is:
C:\Progra~2\Dignus\dasm.exe  "-L\IBMinclude\SYS1.MACLIB\&M" "-L\IBMinclude\SYS1.MODGEN\&M" "-L\IBMinclude\DSNA10.SDSNMACS\&M" "-L\IBMinclude\CEE.SCEEMAC\&M" "-L\IBMinclude\CEE.SCEESAMP\&M" "-L\IBMinclude\CICS.SDFHMAC\&M" "-L\IBMinclude\DBCOLE.XDCZ1D.XDCMACS\&M" "-L\IBMinclude\DSNA10.SDSNMACS\&M" "-L&p\src\zProtect\asm\&M.mac" "-L&p\src\ra\&M.mac" "-LC:\SVN\zFPE6\\asmmacs\&M.mac" "-LC:\Progra~2\Dignus\maclib\&M" -quiet -flisting=testCCompiler.zLST -idr="5694A01   1900" -o CMakeFiles/cmTryCompileExec.dir/testCCompiler.c.o testCCompiler.zASM

But since I’m issuing the build command from the directory above CMakeFiles, I can’t tell whether this means that CMake must be copying the file, but I expect it is. So how is it managing to copy it but lock it?!
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