Simulink/Saber cosimulation

Hello,

I use simulink/Saber cosimulation and when i launch the execution im simulink, I have this message : Error reported by S-function 'SaberSimulinkCosim' in 'mosckt_saber/SaberCosim/S-Function': Unable to get next time from Saber.

I don't understand this. Could you help me

Thank you