MATLAB: Simulink errrors including slmsgviewer


every time i run simulink models,no matter how easy the model is, matlab's command window will occur the following errors . Actually ,i have tried all the way which i could have found ,but they all could not work out .I'm so sad ,anyone would help me?? Thank you in advance !
(use wrongly)错误使用 slmsgviewer.startConnectorIfNotRunning (line 455)
Unable to start Matlab connector from Simulink Message Viewer
(errors)出错 slmsgviewer (line 58)
(errors)出错 slmsgviewer/PersistentInstance (line 297)
(errors)出错 slmsgviewer.processRecord (line 397)