TCP/IP Programming Manual

Effect
The call failed.
Recovery
Use the Subsystem Control Facility (SCF) ALTER command (or its programmatic equivalent), rather
than socket calls. See the TCP/IP Configuration and Management Manual or the TCP/IP
Management Programming Manual for a description of the ALTER command.
EPFNOSUPPORT (4112)
EPFNOSUPPORT
Cause
The specified protocol family is not supported. It has not been configured into the system or no
implementation for it exists. The protocol family is used for the Internet protocols.
Effect
The call failed.
Recovery
Specify AF_INET and retry the operation.
EPIPE (4032)
EPIPE
Cause
A write or send call was attempted on a local socket that had been previously closed with
the shutdown call.
Effect
The call failed.
Recovery
Reestablish the connection using the socket, bind, and connect calls and retry the write
or send call.
EPROTONOSUPPORT (4109)
EPROTONOSUPPORT
Cause
The protocol specified in a call to socket or socket_nw is not supported.
Effect
The call failed.
Recovery
For protocol, specify a number in the range 0 to 255, excluding the values 1, 6, and 17 (the
values assigned to ICMP, TCP, and UDP, respectively).
EPROTOTYPE (4107)
EPROTOTYPE
Cause
The protocol specified does not support the semantics of the socket type requested.
Effect
The call failed.
Recovery
Retry the call using the proper protocol type.
ERANGE (4034)
ERANGE
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