The problem of using CRCN GUI
After installing the CRCN GUI, I opened it and click the confirm button, then, the terminal showed the sentences as below:
Can't open file simsetfile!
java.io.FileNotFoundException: /root/ns-allinone-2.31/ns-2.31/test.tcl (Permission denied)
It seems that creating the tcl script failed, I do not know why~