The CMU-OpenVMS/IP software uses the VMS message facility to signal conditions within the IPACP and to return completion status in I/O status blocks. The CMU-OpenVMS/IP messages are listed in the table below. Each line holds a) the actual hexadecimal code for the message, b) the name of the message, without the "NET$_" prefix, and c) the message text.

In VMS, every message is is a 32-bit value which contains (UNNUMBERED) a severity level (bits 0-2) an ID number (bits 3-15) a facility number (bits 16-27) internal control flags (bits 28-31)

The CMU-OpenVMS/IP software uses a facility number of 99, and all messages are of severity ERROR (2). The messages listed below have sequential ID numbers, begining with 1 for the first message (NET$_IR). So, for instance, if we were to find a message code of 0863805a, we could break is down as follows: 0863805a == 0000 1000 0110 0011 1000 0000 0101 1010 == 0000 = 0 (Internal Control Flags) + (1)000 0110 0011 = 99 (Facility) + (1)000 0000 0101 1 = 11 (Message ID) + 010 = 2 (Severity)

(CMUIP_MESS_1) lists the defined error messages along with their numerical values. (CMU-OpenVMS/IP 6.6 Messages\CMUIP_MESS_1) (3\8\10) (Signal\Name\Description of message) (0863800a\IR\Insufficient system resources) (08638012\IFC\Invalid network function code) (0863801a\IPC\Invalid network protocol code) (08638022\UCT\Unable to create TCB) (0863802a\IFS\Invalid foreign port) (08638032\ILP\Invalid local port) (0863803a\NUC\Non-unique connection specified) (08638042\CSE\Connection table space exhausted) (0863804a\NOPRV\No privilege for access to well-known port) (08638052\CIP\Connection illegal for this process) (0863805a\CDE\Connection does not exist) (08638062\CR\Connection RESET by remote host) (0863806a\FSU\Foreign host unspecified) (08638072\UNN\Unknown network node) (0863807a\VTF\Valid-TCB table full (all connections in use)) (08638082\CREF\Connection refused by remote host) (0863808a\CCAN\Connection cancelled by process abort) (08638092\FIP\IO Function in Progress) (0863809a\BTS\User specified buffer is Too small) (086380a2\IHI\Invalid known host index) (086380aa\BDI\Bad device index) (086380b2\EPD\Error processing device dump) (086380ba\URC\Destination Unreachable) (086380c2\IGF\Invalid GTHST function) (086380ca\UNA\Unknown host name) (086380d2\UNU\Unknown host number) (086380da\CC\Connection is closing - operation invalid) (086380e2\CTO\Connection TimeOut) (086380ea\TWT\Time-Wait TimeOut) (086380f2\TE\Net ACP is Exiting) (086380fa\FTO\User function timeout.) (08638102\NYI\User function not yet implemented) (0863810a\NOPN\UDP wildcard connection not yet open) (08638112\NOINA\Internet access not allowed) (0863811a\NOANA\ARPANET access not allowed) (08638122\NOADR\Name lookup not yet complete - no host address) (0863812a\GTHFUL\GTHST queue full - can't queue name/address lookup) (08638132\DAE\NET$DUMP argument error) (0863813a\NMLTO\Host name lookup time-out) (08638142\NSEXIT\Name lookup failure: name server is exiting) (0863814a\NONS\Name lookup failure: name server is not running) (08638152\NSQFULL\Name lookup failure: name server queue is full) (0863815a\DSDOWN\Name not found in host table) (08638162\DSNODS\Domain service: no domain servers could be contacted) (0863816a\DSINCOMP\Domain service: received incomplete domain server reply) (08638172\DSNOADDR\Domain service: no addresses found for host name) (0863817a\DSNONAME\Domain service: no name found for IP address) (08638182\DSFMTERR\Domain service: domain server returned format error) (0863818a\DSSRVERR\Domain service: domain server error) (08638192\DSNAMERR\Domain service: name error (no such name)) (0863819a\DSNOTIMP\Domain service: domain server returned not implemented) (086381a2\DSREFUSD\Domain service: domain server refused to resolve name) (086381aa\DSNONSRV\Domain service: no usable servers returned by referral) (086381b2\DSUNKERR\Domain service: unknown server error) (086381ba\DSREFEXC\Domain service: maximum referral limit exceeded) (086381c2\GREENERR\Name lookup failure, unknown error code) (086381ca\GP_INVREQ\Name lookup: invalid request (internal error)) (086381d2\GP_INVINF\Name lookup: invalid host info item (internal error)) (086381da\GP_INVNAM\Name lookup: invalid domain name syntax (internal error)) (086381e2\GP_INVADR\Name lookup: invalid address syntax (internal error)) (086381ea\GP_INVMBX\Name lookup: invalid mailbox syntax (internal error)) (086381f2\GP_INVCLS\Name lookup: invalid domain class (internal error)) (086381fa\GP_RSBUSY\Name lookup: resolver to busy to handle query) (08638202\GP_NONMSR\Name lookup: no name server could be found) (0863820a\GP_NOHINF\Name lookup: request host info item does not exist) (08638212\GP_NOTFND\Name lookup: host name not found) (0863821a\GP_UNKMBX\Name lookup: mailbox not found) (08638222\GP_NOTIMP\Name lookup: unimplemented request (internal error)) (0863822a\GP_TOOBIG\Name lookup: request data too big for UDP) (08638232\GP_NSDOWN\Name lookup: all name servers declared down) (0863823a\NRT\No route found for destination)