message ... (errno: #)
message ... (Errcode: #)
You can find out what the error code means by examining the documentation for your system or by using the perror utility.
shell> perror [options] errorcode...
Example:
shell> perror 13 64
Error code 13: Permission denied
Error code 64: Machine is not on the network
shell> perror --ndb errorcode
Note that the meaning of system error messages may be dependent on your operating system. A given error code may mean different things on different operating systems.