Error codes are returned in the same manner as other SWIs, but the error code returned in the block is particular to the Internet socket SWIs. The main ones you will encounter are:
Name Value Meaning
EWOULDBLOCK 35 Operation would block
EINPROGRESS 36 Operation now in progress
EALREADY 37 Operation already in progress
ECONNRESET 54 Connection reset by peer
EISCONN 56 Socket is already connected
ENOTCONN 57 Socket is not connected
ETIMEDOUT 60 Connection timed out
ECONNREFUSED 61 Connection refused
A full list of error number is available.
All error numbers
Name Value Meaning
EPERM 1 Not owner
ENOENT 2 No such file or directory
ESRCH 3 No such process
EINTR 4 Interrupted system call
EIO 5 I/O error
ENXIO 6 No such device or address (Invalid unit number)
E2BIG 7 Arg list too long
ENOEXEC 8 Exec format error
EBADF 9 Bad file number
ECHILD 10 No children
EDEADLK 11 Resource deadlock avoided
ENOMEM 12 Not enough memory
EACCES 13 Permission denied
EFAULT 14 Bad address
ENOTBLK 15 Block device required
EBUSY 16 Mount device busy
EEXIST 17 File exists
EXDEV 18 Cross-device link
ENODEV 19 No such device
ENOTDIR 20 Not a directory
EISDIR 21 Is a directory
EINVAL 22 Invalid argument passed
ENFILE 23 File table overflow
EMFILE 24 Too many open files
ENOTTY 25 Not a typewriter (Inappropriate ioctl for device)
ETXTBSY 26 Text file busy
EFBIG 27 File too large
ENOSPC 28 No space left on device
ESPIPE 29 Illegal seek
EROFS 30 Read-only file system
EMLINK 31 Too many links
EPIPE 32 Broken pipe
EDOM 33 Argument too large
ERANGE 34 Result too large
EWOULDBLOCK 35 Operation would block
EAGAIN 35 Synonym for EWOULDBLOCK
EINPROGRESS 36 Operation now in progress
EALREADY 37 Operation already in progress
ENOTSOCK 38 Socket operation on non-socket
EDESTADDRREQ 39 Destination address required
EMSGSIZE 40 Message too long
EPROTOTYPE 41 Protocol wrong type for socket
ENOPROTOOPT 42 Protocol not available
EPROTONOSUPPORT 43 Protocol not supported
ESOCKNOSUPPORT 44 Socket type not supported
EOPNOTSUPP 45 Operation not supported on socket
ENOTSUP 45 Synonym for EOPNOTSUPP
EPFNOSUPPORT 46 Protocol family not supported
EAFNOSUPPORT 47 Address family not supported by protocol family
EADDRINUSE 48 Address already in use
EADDRNOTAVAIL 49 Can't assign requested address
ENETDOWN 50 Network is down
ENETUNREACH 51 Network is unreachable
ENETRESET 52 Network dropped connection on reset
ECONNABORTED 53 Software caused connection abort
ECONNRESET 54 Connection reset by peer
ENOBUFS 55 No buffer space available
EISCONN 56 Socket is already connected
ENOTCONN 57 Socket is not connected
ESHUTDOWN 58 Can't send after socket shutdown
ETOOMANYREFS 59 Too many references: can't splice
ETIMEDOUT 60 Connection timed out
ECONNREFUSED 61 Connection refused
ELOOP 62 Too many levels of symbolic links
ENAMETOOLONG 63 File name too long
EHOSTDOWN 64 Host is down
EHOSTUNREACH 65 No route to host
ENOTEMPTY 66 Directory not empty
EPROCLIM 67 Too many processes
EUSERS 68 Too many users
EDQUOT 69 Disc quota exceeded
ESTALE 70 Stale NFS file handle
EREMOTE 71 Too many levels of remote in path
EBADRPC 72 RPC structure is bad
ERPCMISMATCH 73 RPC version is wrong
EPROGUNAVAIL 74 RPC program not available
EPROGMISMATCH 75 RPC program version wrong
EPROCUNAVAIL 76 RPC bad procedure for program
ENOLCK 77 No locks available
ENOSYS 78 Function not implemented
EFTYPE 79 Inappropriate file type or format
EAUTH 80 Authentication error
ENEEDAUTH 81 Need authenticator
EIDRM 82 Identifier removed
ENOMSG 83 No message of desired type
EOVERFLOW 84 Value too large to be stored in data type
ECANCELED 85 Operation canceled
EILSEQ 86 Illegal byte sequence
ENOATTR 87 Attribute not found
EDOOFUS 88 Programming error
EBADMSG 89 Bad message
EMULTIHOP 90 Multihop attempted
ENOLINK 91 Link has been severed
EPROTO 92 Protocol error
ENOTCAPABLE 93 Capabilities insufficient
ECAPMODE 94 Not permitted in capability mode
Note: I'm guessing what some of these are.
Error number should be returned offset by the base &20E00.
Error numbers <= 127 (after removing the error base) are Unix style error numbers from the above table. Error numbers >= 128 are used for special error numbers, such as those returned by a DCI4 hardware driver.
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