Unicon Language Reference Clinton L. Jeffery Shamim Mohamed ...

401 co-expressions not implemented
402 program not compiled with debugging option
500 program malfunction
600 vidget usage error
9.2 System errors
If an error occurs during the execution of a system function, by default the function fails and
keywords &errornumber, &errortext and &errorvalue will be set. This contrasts with runtime
errors, which terminate execution by default. Whereas runtime errors can be converted to failure
by setting &error, system errors can be converted to a runtime error by setting keyword &syserr
to a non-null value.
The complete set of system errors is by definition platform specific. Error numbers above the
value 1000 are used for system errors. Many of the POSIX standard system errors are supported
across platforms, and error numbers between 1001 and 1040 are reserved for the system errors
listed below. Platforms may report other system error codes so long as they do not conflict with
existing runtime or system error codes.
1001 Operation not permitted
1002 No such file or directory
1003 No such process
1004 Interrupted system call
1005 I/O error
1006 No such device or address
1007 Arg list too long
1008 Exec format error
1009 Bad file number
1010 No child processes
1011 Try again
1012 Out of memory
1013 Permission denied
1014 Bad address
1016 Device or resource busy
1017 File exists
1018 Cross-device link
1019 No such device
1020 Not a directory
1021 Is a directory
1022 Invalid argument
1023 File table overflow
1024 Too many open files
1025 Not a typewriter
1027 File too large
1028 No space left on device
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