Error during the make process in simulink

I get the following error:

Making simulation target "A320NEO_LPBAV_Model_sfun", ...

'A320NEO_LPBAV_Model_sfun.bat' is not recognized as an internal or external command, operable program or batch file.

Error using A320NEO_LPBAV_Model_Run_Script (line 34) Error using targetman>throw_make_error (line 588) (SLSF Diagnostic)

Ithe error occurs whe I add a Matlab Function block to the model. The model was develop in Matlab R2009b but I run it and modify it in R2012b I cannot update to a newer version of matlab I have to use R2012b

A model with just the Matlab function block in it work fine.

Xavier Ollat