Error evaluating initFcn ; Callback string is 'rtw.pil.S​ILPILBlock​.initFcnCa​llback(gcb​);'

Hello All,

I'm facing this error when i tried creating SIL block of the model and together simulate and check whether my model and code is fine. But iam not able to simulate the model

Error evaluating 'InitFcn' callback of S-Function block (mask) 'ForTesting/test on/mut_sfcn'. Callback string is 'rtw.pil.SILPILBlock.initFcnCallback(gcb);' Caused by: An error occurred while calling into the SIL or PIL target connectivity implementation. Error(s) encountered while building "mut"