Matlab error using accelerator mode - matlab

Question

I´m building a complex model in Simulink which took 50 minutes to run completely. I would like to use the accelerator mode but, after install the right version of virtual studio and SDK (http://www.mathworks.com/matlabcentral/answers/96050-how-can-i-set-up-microsoft-visual-studio-2008-express-edition-for-use-with-matlab-7-7-r2008b-on-32) I still have this error:
### Building the Accelerator target for model: deg_final_FAST
### Generating code into build directory: H:\ale peticchia_March2016\Simulink\model\deg_final_FAST_accel_rtw
Warning: Function H:\ale peticchia_March2016\Simulink\model\input.m has
the same name as a MATLAB builtin. We suggest you rename the function to
avoid a potential name conflict.
### Invoking Target Language Compiler on deg_final_FAST.rtw
tlc
-r
H:\ale peticchia_March2016\Simulink\model\deg_final_FAST_accel_rtw\deg_final_FAST.rtw
C:\Program Files\MATLAB\R2008b\rtw\c\accel\accel.tlc
-OH:\ale peticchia_March2016\Simulink\model\deg_final_FAST_accel_rtw
-IC:\Program Files\MATLAB\R2008b\rtw\c\accel
-IH:\ale peticchia_March2016\Simulink\model\deg_final_FAST_accel_rtw\tlc
-IC:\Program Files\MATLAB\R2008b\rtw\c\tlc\mw
-IC:\Program Files\MATLAB\R2008b\rtw\c\tlc\lib
-IC:\Program Files\MATLAB\R2008b\rtw\c\tlc\blocks
-IC:\Program Files\MATLAB\R2008b\rtw\c\tlc\fixpt
-IC:\Program Files\MATLAB\R2008b\stateflow\c\tlc
-aEnforceIntegerDowncast=1
-aFoldNonRolledExpr=1
-aInlineInvariantSignals=0
-aInlineParameters=0
-aLocalBlockOutputs=1
-aRollThreshold=5
-aForceBlockIOInitOptimize=0
-aGenerateReport=0
-aGenCodeOnly=0
-aRTWVerbose=1
-aIncludeHyperlinkInReport=0
-aLaunchReport=0
-aGenerateTraceInfo=0
-aForceParamTrailComments=0
-aGenerateComments=1
-aIgnoreCustomStorageClasses=1
-aIncHierarchyInIds=0
-aMaxRTWIdLen=31
-aShowEliminatedStatements=0
-aIncDataTypeInIds=0
-aInsertBlockDesc=0
-aIgnoreTestpoints=0
-aSimulinkBlockComments=1
-aInlinedPrmAccess="Literals"
-aTargetFcnLib="ansi_tfl_table_tmw.mat"
-aIsPILTarget=0
-aLogVarNameModifier="rt_"
-aGenerateFullHeader=1
-aGenerateTraceInfo=0
-aIgnoreTestpoints=0
-p10000
### Loading TLC function libraries
...
### Initial pass through model to cache user defined code
....
### Caching model source code
......................................................................
### Writing header file deg_final_FAST_acc_types.h
### Writing header file deg_final_FAST_acc.h
### Writing source file deg_final_FAST_acc.c
.
### Writing header file deg_final_FAST_acc_private.h
### Writing source file deg_final_FAST_acc_data.c
### Writing header file rt_nonfinite.h
### Writing source file rt_nonfinite.c
.
### Writing header file rtGetInf.h
### Writing source file rtGetInf.c
### Writing header file rtGetNaN.h
### Writing source file rtGetNaN.c
.
### TLC code generation complete.
Warning: Function H:\ale peticchia_March2016\Simulink\model\input.m has
the same name as a MATLAB builtin. We suggest you rename the function to
avoid a potential name conflict.
.
### Processing Template Makefile: C:\Program Files\MATLAB\R2008b\rtw\c\accel\accel_vcx64.tmf
### deg_final_FAST.mk which is generated from C:\Program Files\MATLAB\R2008b\rtw\c\accel\accel_vcx64.tmf is up to date
### Building deg_final_FAST: .\deg_final_FAST.bat
H:\ale peticchia_March2016\Simulink\model\deg_final_FAST_accel_rtw>call "C:\Program Files (x86)\Microsoft Visual Studio 9.0\Common7\Tools\/../../VC/vcvarsall" AMD64
Setting environment for using Microsoft Visual Studio 2008 Beta2 x64 tools.
WindowsSdkDir not found
Microsoft (R) Program Maintenance Utility, Version 9.00.21022.08
Copyright (C) Microsoft Corporation. Alle Rechte vorbehalten.
C:\PROGRA~1\MATLAB\R2008b\rtw\c\tools\vctools.mak(8) : fatal error U1052: Datei "ntwin32.mak" nicht gefunden
Stop.
The make command returned an error of 2
'An_error_occurred_during_the_call_to_make' is not recognized as an internal or external command,
operable program or batch file.
### Real-Time Workshop build procedure for model: 'deg_final_FAST' aborted due to an error.
Warning: Function H:\ale peticchia_March2016\Simulink\model\input.m has
the same name as a MATLAB builtin. We suggest you rename the function to
avoid a potential name conflict.
Warning: Function H:\ale peticchia_March2016\Simulink\model\input.m has
the same name as a MATLAB builtin. We suggest you rename the function to
avoid a potential name conflict.
Warning: Function H:\ale peticchia_March2016\Simulink\model\input.m has
the same name as a MATLAB builtin. We suggest you rename the function to
avoid a potential name conflict.
??? Error using ==> Degradation_model_matlab_fast at 27
Problem creating Accelerator MEX file for model 'deg_final_FAST'. Error
returned is:
Error using ==> genMakefileAndBuild at 1079
Error(s) encountered while building model "deg_final_FAST".
Do you have suggestions?
Thanks for your help!
matlab R2008b
win7 64bit