RC-50221: Warning: Port Pool 50 is not free

RC-50221: Warning: Port Pool 50 is not free

Solution:

Means the port is used by some other program on your host. Use a different port pool number, or try to release the port which is already reserved

$ netstat -a | grep <port number>

Kill the process that use that port using "kill -9 <process id>" command or simply reboot the box (if possible).