ERROR IN LOAD SOURCE ANG DIS DATA

[Krystalgirl]

HELLO, I‘m practicing the modle,Mixsiar，with the R script,But,I met some problems that I can not solve.I practiced the example of wloves in the manual.I successfully loaded the mix data with the script,but I could not load the source and dis data.The system always prompt me that mix not found.I exactly don't know what‘s wrong with my process. Could you please answer me ? I would appreciate it If you can help me . Thank you very much!