Return codes (errnos)

Return codes, also known as errnos, are generated by the system in response to either an action or lack of action that has been detected. This section provides a summary of the various z/OS UNIX return codes a user might receive. However, this summary is not all inclusive because of the unique return codes are internal to z/OS® and subject to change.

Decimal Value	Hex Value	Return Code	Description
1	0001	EDOM	Error in the domain.
2	0002	ERANGE	Result is too large.
111	006F	EACCES	Permission is denied.
112	0070	EAGAIN	The resource is temporarily unavailable.
113	0071	EBADF	The file descriptor is incorrect.
114	0072	EBUSY	The resource is busy.
115	0073	ECHILD	No child process exists.
116	0074	EDEADLK	A resource deadlock is avoided.
117	0075	EEXIST	The file exists.
118	0076	EFAULT	The address is incorrect.
119	0077	EFBIG	The file is too large.
120	0078	EINTR	A function call is interrupted.
121	0079	EINVAL	The parameter is incorrect.
122	007A	EIO	An I/O error occurred.
123	007B	EISDIR	The file specified is a directory.
124	007C	EMFILE	Too many files are open for this process.
125	007D	EMLINK	Too many links occurred.
126	007E	ENAMETOOLONG	The filename is too long.
127	007F	ENFILE	Too many files are open in the system.
128	0080	ENODEV	No such device exists.
129	0081	ENOENT	No such file, directory, or IPC member exists.
130	0082	ENOEXEC	The exec call contained a format error.The target module on an exec call was not a valid executable module. The additional reason codes provided are useful for internal debugging by IBM® service representatives.
131	0083	ENOLCK	No locks are available.
132	0084	ENOMEM	Not enough space is available.
133	0085	ENOSPC	No space is left on the device, or no space is available to create the IPC member ID.
134	0086	ENOSYS	The function is not implemented.
135	0087	ENOTDIR	Not a directory.
136	0088	ENOTEMPTY	The directory is not empty.
137	0089	ENOTTY	The I/O control operator is inappropriate.
138	008A	ENXIO	No such device or address exists.
139	008B	EPERM	The operation is not permitted.
140	008C	EPIPE	The pipe is broken.
141	008D	EROFS	The specified file system is read only.
142	008E	ESPIPE	The seek is incorrect.
143	008F	ESRCH	No such process or thread exists.
144	0090	EXDEV	A link to a file on another file system was attempted.
145	0091	E2BIG	The parameter list is too long, or the message to receive was too large for the buffer.
146	0092	ELOOP	A loop is encountered in symbolic links.
147	0093	EILSEQ	The byte sequence is illegal.
149	0095	EOVERFLOW	A value is too large to be stored in the data type.
150	0096	EMVSNOTUP	OpenMVS kernel is not active.
151	0097	EMVSDYNALC	Dynamic allocation error.
152	0098	EMVSCVAF	Common VTOC access facility (CVAF) error.
153	0099	EMVSCATLG	Catalog obtain error.
156	009C	EMVSINITIAL	Process Initialization error.
157	009D	EMVSERR	A MVS™ environmental or internal error has occurred.
158	009E	EMVSPARM	Bad parameters were passed to the service.
159	009F	EMVSPFSFILE	HFS encountered a permanent file error.
162	00A2	EMVSPFSPERM	HFS encountered a system error.
163	00A3	EMVSSAFEXTRERR	SAF/RACF extract error.
164	00A4	EMVSSAF2ERR	SAF/RACF error.
167	00A7	EMVSNORTL	Access to the OpenMVS version of the C RTL is denied.
168	00A8	EMVSEXPIRE	The password for the specified resource has expired.
169	00A9	EMVSPASSWORD	The new password specified is not valid.
170	00AA	EMVSWLMERROR	A WLM service ended in error.
171	00AB	EMVSCPLERROR	A Coupling Facility service ended in error.
172	00AC	EMVSARMERROR	An ARM service ended in error.
247	00F7	ENOTSUP	Operation Not Supported in this situation
1002	03EA	EIBMSOCKOUTOFRANGE	Socket number assigned by client interface code (for socket() and accept()) is out of range.
1003	03EB	EIBMSOCKINUSE	Socket number assigned by client interface code is already in use.
1005	03ED	EOFFLOADboxERROR	Offload box error.
1006	03EE	EOFFLOADboxRESTART	Offload box restarted.
1007	03EF	EOFFLOADboxDOWN	Offload box down.
1008	03F0	EIBMCONFLICT	Already a conflicting call outstanding on socket.
1009	03F1	EIBMCANCELLED	Request cancelled via SOCKcallCANCEL request.
1011	03F3	EIBMBADTCPNAME	SetIbmOpt specified a name of a PFS that either was not configured or was not a Sockets PFS.
1100	044C	ENOTBLK	Block device required.
1101	044D	ETXTBSY	Text file busy.
1102	044E	EWOULDBLOCK	The descriptor is marked nonblocking, and the requested function cannot complete immediately.
1103	044F	EINPROGRESS	Operation now in progress.
1104	0450	EALREADY	Operation already in progress.
1105	0451	ENOTSOCK	Socket operation on a non-socket.
1106	0452	EDESTADDRREQ	Destination address required.
1107	0453	EMSGSIZE	The message is too large to be sent all at once, as required.
1108	0454	EPROTOTYPE	The socket type is incorrect.
1109	0455	ENOPROTOOPT	Protocol or socket option not available.
1110	0456	EPROTONOSUPPORT	Protocol not supported.
1111	0457	ESOCKTNOSUPPORT	Socket type not supported.
1112	0458	EOPNOTSUPP	The referenced socket is not a type that supports the requested function.
1113	0459	EPFNOSUPPORT	Protocol family not supported.
1114	045A	EAFNOSUPPORT	The address family is not supported.
1115	045B	EADDRINUSE	The address is already in use.
1116	045C	EADDRNOTAVAIL	Cannot assign requested address.
1117	045D	ENETDOWN	Network is down.
1118	045E	ENETUNREACH	Network is unreachable.
1119	045F	ENETRESET	Network dropped connection on reset.
1120	0460	ECONNABORTED	Software caused connection abort.
1121	0461	ECONNRESET	Connection reset by peer.
1122	0462	ENOBUFS	Insufficient buffer space available.
1123	0463	EISCONN	The socket is already connected.
1124	0464	ENOTCONN	The socket is not connected.
1125	0465	ESHUTDOWN	Cannot send after socket shutdown.
1126	0466	ETOOMANYREFS	Too many references: cannot splice.
1127	0467	ETIMEDOUT	Connection timed out.
1128	0468	ECONNREFUSED	The attempt to connect was rejected.
1129	0469	EHOSTDOWN	Host is down.
1130	046A	EHOSTUNREACH	No route to host.
1131	046B	EPROCLIM	Too many processes.
1132	046C	EUSERS	Too many users.
1133	046D	EDQUOT	Disc quota exceeded.
1134	046E	ESTALE	Stale file handle.
1135	046F	EREMOTE	Too many levels of remote in path.
1136	0470	ENOSTR	Device is not a stream.
1137	0471	ETIME	Timer expired.
1138	0472	ENOSR	Out of streams resources.
1139	0473	ENOMSG	No message of the desired type.
1140	0474	EBADMSG	Trying to read unreadable message.
1141	0475	EIDRM	Identifier removed.
1142	0476	ENONET	Machine is not on the network.
1143	0477	ERREMOTE	Object is remote.
1144	0478	ENOLINK	The link has been severed.
1145	0479	EADV	Advertise error.
1146	047A	ESRMNT	srmount error.
1147	047B	ECOMM	Communication error on send.
1148	047C	EPROTO	Protocol error.
1149	047D	EMULTIHOP	Protocol error.
1150	047E	EDOTDOT	Cross mount point.
1151	047F	EREMCHG	Remote address change.
1152	0480	ECANCELED	The asynchronous I/O request has been canceled.
1153	0481	ETcpOutOfState	Socket send/receive gotten out of order.
1154	0482	ETcpUnattach	Unattached streams error.
1155	0483	ETcpBadObj	Streams push object error.
1156	0484	ETcpClosed	Streams closed error.
1157	0485	ETcpLinked	Streams link error.
1158	0486	ETcpErr	Tcp error.
1159	0487	EINTRNODATA	Accept_and_receive is interrupted after the connection arrived but before the first data arrived.
1160	0488	ENOREUSE	Socket descriptor reuse is not supported.
1161	0489	ENOMOVE	FileSystem can not be moved.
3448	0D78	EUNATCH	The protocol required to support the specified address family is not available.