Error in 'FUZZY_LOGIC1/Fuzzy Logic Controller/FIS S-function' while executing C MEX S-function 'sffis', (mdlStart), at time 0.0. Caused by: Exiting ...

Hello iam working on model that is having fuzzy logic interface block , iam facing this error ''Error in 'FUZZY_LOGIC1/Fuzzy Logic Controller/FIS S-function' while executing C MEX S-function 'sffis', (mdlStart), at time 0.0. Caused by: Exiting ...'' can anyone help me regaring this.

thanks