Oracle Message PGA-22003 - communication error: TCP/IP string failed, rc = number, for, string

ERROR	communication error: TCP/IP string failed, rc = number, for, string
CAUSE	An unexpected communications error occurred while executing the specified TCP/IP function . The TCP/IP function return code is and the function parameter is .
ACTION	If the problem cannot be resolved, the supported customers should contant Oracle Support Servics for assistance.