Simulink code generation error !!

I'm trying to generate code from my simulink model, which uses level-2 s-functions. I'm getting below error. Appreciate your help in resolving this issue.

Line 62,81 in SFunSLPTarget.m are accessing a mexfunction.

 Error evaluating registered method 'Start' of MATLAB S-Function 'sFunSLPTarget' in 'PSM_HIL_v005/(192.168.56.101:50021)/Level-2 MATLAB S-Function'. The following is the MATLAB call stack (file names and line numbers) that produced this error: 
 ['C:\Users\hrdctest\Desktop\slppoints\sim\sFunSLPTarget.m'] [62]
 ['C:\Program Files (x86)\MATLAB\R2014b\toolbox\rtw\rtw\tlc_c.m'] [178]
 ['C:\Program Files (x86)\MATLAB\R2014b\toolbox\coder\simulinkcoder_core\+coder\+internal\ModelBuilder.m'] [599]
 ['C:\Program Files (x86)\MATLAB\R2014b\toolbox\coder\simulinkcoder_core\+coder\+internal\@ModelCodegenMgr\make_rtw.m'] [8]
 ['C:\Program Files (x86)\MATLAB\R2014b\toolbox\rtw\rtw\make_rtw.m'] [18]
 ['C:\Program Files (x86)\MATLAB\R2014b\toolbox\simulink\simulink\private\build_target.p'] [93]
 ['C:\Program Files (x86)\MATLAB\R2014b\toolbox\simulink\simulink\private\build_target.p'] [5]
 ['C:\Program Files (x86)\MATLAB\R2014b\toolbox\simulink\simulink\private\build_standalone_rtw_target.p'] [59]
 ['C:\Program Files (x86)\MATLAB\R2014b\toolbox\simulink\simulink\private\slbuild_private.p'] [749]
 ['C:\Program Files (x86)\MATLAB\R2014b\toolbox\simulink\simulink\private\slbuild_private.p'] [421]
 ['C:\Program Files (x86)\MATLAB\R2014b\toolbox\simulink\simulink\sl.m'] [15]
 ['C:\Program Files (x86)\MATLAB\R2014b\toolbox\simulink\simulink\slbuild.m'] [61]
 ['C:\Program Files (x86)\MATLAB\R2014b\toolbox\coder\simulinkcoder_core\+coder\+internal\simulinkcodermenus.p'] [441]

matlab:slppoints:src:mexslppoints.cpp: failed to connect to slp target (192.168.56.101:50021